View source for Tau

{{also|Appendix:Variations of "tau"}}
{{minitoc}}
==English==
{{was wotd|2022|June|28}}

===Etymology===
{{letter_disp2|sigma|[[File:Greek uc tau.svg|35px]][[File:Greek lc tau.svg|25px]]|upsilon|ταῦ|Τ|τ}}
{{multiple images
|direction = vertical
|image1 = Antoniterkloster Höchst Antoniterkreuz.jpg
|caption1 = A tau ''({{senseno|en|tau-shaped object or sign}})'' used as the [[symbol#Noun|symbol]] of the {{w|Hospital Brothers of Saint Anthony}} in the [[w:de:Antoniterkloster Höchst|Antoniterkloster Höchst]], a [[former]] [[monastery]] in [[w:Höchst (Frankfurt am Main)|Höchst]], a [[quarter#Noun|quarter]] of [[Frankfurt am Main]], [[Hesse]], [[Germany]].
|image2 = 2pi-unrolled.gif
|caption2 = When a [[circle#Noun|circle]]’s [[radius]] is 1 [[unit]], its [[circumference]] is [[twice]] the [[value#Noun|value]] of [[pi]] ([[2]]{{lang|grc|[[π]]}}) or tau ({{lang|grc|[[τ]]}}; ''{{senseno|en|constant}}'') units.
|image3 = MAP2-tau in neurons.jpg
|caption3 = An [[image#Noun|image]] of [[neuron]]s. The taus or [[tau protein]]s ''({{senseno|en|tau protein}})'' are [[stain#Verb|stained]] [[red#Noun|red]].
}}

From {{inh|en|enm|tau}}, {{m|enm|taue}}, from {{der|en|la|tau}}, from {{der|en|grc|ταῦ}} and {{der|en|he|תָּו|tr=tav}}.

Sense 6 (“mathematical constant equal to 2{{lang|grc|π}}”) was used by Joseph M. Lindenberg in 1991, and popularized by the American educator and entrepreneur Michael Hartl in a 2010 paper which explains that {{lang|grc|τ}} resembles {{lang|grc|π}}; and that {{lang|grc|τ}} is the Greek equivalent of {{m|en|t}}, the first letter of {{m|en|turn}}, and 2{{lang|grc|π}} corresponds to one turn of a circle with a radius of one unit.<ref>{{cite-web|author=Michael Hartl|title=The Tau Manifesto|work=Tauday.com|url=https://tauday.com/tau-manifesto|archiveurl=https://web.archive.org/web/20220130061349/https://tauday.com/tau-manifesto|archivedate=30 January 2022|date=28 June 2010|section=section 4.1 (One Turn)|passage=There are two main reasons to use {{lang|grc|τ}} for the circle constant. The first is that {{lang|grc|τ}} visually resembles π: after centuries of use, the association of π with the circle constant is unavoidable, {{...}} The second reason is that {{lang|grc|τ}} corresponds to one ''turn'' of a circle, and you may have noticed that “{{lang|grc|τ}}” and “turn” both start with a “t” sound.}}</ref>

Sense 8.1 (“''short for'' tau lepton ''or'' tau particle”) was {{coinage|en|Martin Lewis Perl|nat=the American|occ=physicist|nobycat=1|nocap=1}} (1927–2014) after the first letter of {{noncog|grc|τρίτον|t=third}}, since the tau lepton or tauon was the third charged lepton discovered.<ref>{{cite-book|author=Martin L[ewis] Perl|authorlink=Martin Lewis Perl|title=Evidence for, and Properties of, the New Charged Heavy Lepton|url=http://slac.stanford.edu/pubs/slacpubs/1750/slac-pub-1923.pdf|archiveurl=https://web.archive.org/web/20210709185210/https://slac.stanford.edu/pubs/slacpubs/1750/slac-pub-1923.pdf|archivedate=9 July 2021|series=SLAC-PUB-1923|month=April|year=1977|section=section 1 (Introduction)|page=3|newversion=published in|editor2={{w|Trần Thanh Vân}}|title2=Proceedings of the Twelfth Rencontre de Moriond: Flaine, Haute-Savoie, France, March, 6–18, 1977|series2=Moriond Proceedings|seriesvolume2=19|volume2=1 (Leptons and Multileptons)|location2=Orsay, Paris|publisher2=Laboratoire de Physique Théorique et Particules Elémentaires [Laboratory of Theoretical Physics and Elementary Particles], [[w:Paris-Sud University|Université de Paris-Sud]]|year2=1977|pages2=75–97|oclc2=634313954|passage=Since there is now substantial evidence that it [the new elementary particle] is a lepton, we wish to designate it by a lower case Greek letter. We use <math>\tau^\pm</math> because it appears to be the third charged lepton to be found and {{lang|grc|τριτον}} means third in Greek. We feel the old use of <math>\tau</math> to designate the three pion decay mode of the K is now obsolete.}}</ref>

===Pronunciation===
* {{IPA|en|/taʊ/|/tɔː/|a=RP}}
* {{IPA|en|/taʊ/|/tɔ/|a=GA}}
** {{audio|en|En-us-tau.ogg|a=GA|IPA=/taʊ/}}
* {{rhymes|en|aʊ|ɔː|s=1}}

===Noun===
{{en-noun}}

# {{senseid|en|Greek letter}} The [[letter#Noun|letter]] {{m|grc|Τ//τ|tr=-}} in the [[Greek#Adjective|Greek]] [[alphabet#Noun|alphabet]]; being the [[nineteenth]] letter of the [[Classical Greek|Classical]] and [[Modern Greek]], and the [[twenty-first]] letter of the [[Old Greek|Old]] and [[Ancient Greek]] alphabets.
# {{alternative form of|en|taw}}; the 22nd and last letter of many [[Semitic]] [[alphabet]]s/[[abjad]]s, including [[Phoenician]], [[Aramaic]], [[Hebrew]], [[Syriac]]{{,}} and [[Arabic]].
#* {{quote-book|en|author=Richard Edmund Tyrwhitt|title=Sermons Chiefly Expository|volume=I|location=Oxford|publisher=John Henry Parker; [[w:Rivington (publishers)|F[rancis] and J[ohn] Rivington]], London|year=1847|page=366|passage=Hence it appears that the spits, or skewers, on which and to which the lamb was fixed and fastened in order to be roasted, assumed the form of a ''cross'', not such a {{smallcaps|tau-cross}} as is engraved in Dr. Oliver’s Historical Landmarks of Freemasonry, vol. i. p. 80. having three arms only like the {{smallcaps|Greek}} letter ''tau;'' but a cross like the ancient {{smallcaps|Hebrew}} '''''tau''''', with four arms, though not necessarily all of equal length.}}
#* {{quote-book|en|author=[[w:Daniel Rock|D[aniel] Rock]]|title=Hierurgia; or Transubstantiation, Invocation of Saints, Relics, and Purgatory, Besides Those Other Articles of Doctrine Set Forth in the Holy Sacrifice of the Mass, Expounded;{{nb...|and the Use of Holy Water, Incense, and Images, the Ceremonies, Vestments, and Ritual Employed in Its Celebration among the Latins, Greeks, & Orientals, Illustrated from Paintings, Sculptures, and Inscriptions Found in the Roman Catacombs, or Belonging to the Earliest Ages of Faith}}|edition=2nd|location=London|publisher=C. Dolman,{{nb...|61, New Bond Street, and 22, Paternoster Row}}|year=1851|page=350|passage=In the Spanish translation of Sallust, by the Infant Don Gabriel in 1772, called the Infant Sallust, there is a curious dissertation by Father Perez Bayer on the resemblance between the ancient Hebrew and Phœnician alphabets, in which it is observed that the Hebrew '''Tau''' was written in pure Phœnician, {{...}}}}
#* {{quote-book|en|author=Piers Vaughan|title=Capitular Development Course|edition=2nd|publisher=Rose Circle Publications|year=2017|page=135|isbn=9780981542119|passage=The '''tau''' is both the 19<sup>th</sup> letter of the Greek alphabet, and also the 22<sup>nd</sup> letter of the Hebrew alphabet. In this context, the Hebrew '''''tau''''' or ''tav'' is more pertinent.}}
# {{senseid|en|tau-shaped object or sign}} A {{lang|grc|Τ}}-[[shaped#Adjective|shaped]] [[object#Noun|object]] or [[sign#Noun|sign]]; a [[Saint Anthony's cross]], sometimes [[regard#Verb|regarded]] as a [[sacred#Adjective|sacred]] [[symbol#Noun|symbol]].
#* {{RQ:Browne Hydriotaphia|chapter=I|page=96|passage=Nor ſhall we take in the myſticall '''''Tau''''', or the Croſſe of our bleſſed Saviour, which having in ſome deſcriptions an ''Empedon'' or croſſing foot-ſtay, made not one ſingle tranſverſion.}}
## {{lb|en|Christianity}} A [[crosier]] with a {{lang|grc|Τ}}-shaped [[head#Noun|head]].
# The [[ankh]] symbol ([[☥]]).
#: {{synonyms|en|crux ansata}}
# {{lb|en|astronomy}} ''Chiefly [[write#Verb|written]]'' '''{{lang|grc|τ}}''': {{non-gloss|used to [[designate#Verb|designate]] the nineteenth [[star#Noun|star]] (usually according to [[brightness]]) in a [[constellation]].}}
# {{lb|en|finance}} A [[measurement]] of the [[sensitivity]] of the [[value#Noun|value]] of an [[option#Noun|option]] to [[change#Noun|changes]] in the [[implied]] [[volatility]] of the [[price#Noun|price]] of the [[underlying#Adjective|underlying]] [[asset]].
#: {{synonyms|en|kappa|vega}}
#: {{hypernyms|en|Greeks}} {{qualifier|includes a list of coordinate terms}}
# {{senseid|en|constant}} {{lb|en|mathematics|neologism}} ''Chiefly written'' '''{{lang|grc|τ}}''': an [[irrational#Adjective|irrational]] and [[transcendental#Adjective|transcendental]] [[constant#Noun|constant]] [[represent]]ing the [[ratio]] of the [[circumference]] of a [[Euclidean]] [[circle#Noun|circle]] to its [[radius]], [[equal#Adjective|equal]] to [[twice]] the [[value#Noun|value]] of [[pi]] ([[2]]{{lang|grc|[[π]]}}; [[approximately]] 6.2831853071).
# {{senseid|en|tau protein}} {{lb|en|neurology}} {{short for|en|tau protein|t=a [[protein]] [[abundant]] especially in the [[neuron]]s of the [[human#Adjective|human]] [[central nervous system]] that [[stabilize]]s [[microtubule]]s, and when [[misfold#Verb|misfolded]] is [[associate#Verb|associated]] with [[form#Noun|forms]] of [[dementia]] such as [[Alzheimer's disease|Alzheimer's]] and [[Parkinson's disease|Parkinson's diseases]]}}
#* {{quote-book|en|author=w:Matt Ridley|title=[[w:Genome (book)|Genome: The Autobiography of a Species in 23 Chapters]]|location=London|publisher=w:Harper Perennial|year=1999|year_published=2004|page=263|isbn=978-1-85702-835-5|passage=Quite what that job is remains obscure, but one theory is that it is to stabilise another protein called '''tau''', which is supposed in turn to keep in shape the tubular ‘skeleton’ of a neuron.}}
# {{lb|en|particle}} ''Chiefly written'' '''{{lang|grc|τ}}'''.
## {{short for|en|tau lepton|nodot=1}} ''or'' '''tau particle''' (“an [[unstable]] [[elementary particle]] which is a [[type#Noun|type]] of [[lepton]], [[have#Verb|having]] a [[mass#Noun|mass]] almost [[twice]] that of a [[proton]], a [[negative#Adjective|negative]] [[charge#Noun|charge]], and a [[spin#Noun|spin]] of [[½]]; it [[decay#Verb|decays]] into [[hadron]]s (usually [[pion]]s) or other leptons, and [[neutrino]]s; a [[tauon]]”).
## {{lb|en|historical}} {{short for|en|tau meson|nodot=1}}, now [[know#Verb|known]] as a [[kaon]].

====Derived terms====
{{col3|en
|tau cross
|tauon
|tauopathy
|tau lepton
|tau meson
|tau neutrino
|tau particle
|tau protein
|tau bone|tau effect|tau staff|tau tangle
}}

====Translations====
{{multitrans|data=
{{trans-top|the letter {{m|grc|Τ//τ|tr=-}} in the Greek alphabet}}
* Arabic: {{tt|ar|تَاو|m}}
* Asturian: {{t+|ast|tau}}
* Catalan: {{tt+|ca|tau|f}}
* Chinese:
*: Mandarin: {{tt+|cmn|陶|tr=táo}}, {{tt+|cmn|套|tr=tào}}
* Czech: {{tt|cs|tau|n}}
* Danish: {{tt+|da|tau|n}}
* Dutch: {{tt+|nl|tau|m|f}}
* Esperanto: {{tt+|eo|taŭo}}
* Finnish: {{tt+|fi|tau}}
* French: {{tt+|fr|tau|m}}
* Georgian: {{tt|ka|ტაუ}}
* German: {{tt+|de|Tau|n}}
* Greek: {{tt+|el|ταυ|n}}
*: Ancient: {{tt|grc|ταῦ|n}}
* Hebrew: {{tt|he|טָאוּ|f|tr=tau}}
* Hungarian: {{tt+|hu|tau}}
* Icelandic: {{tt+|is|tá|n}}
* Interlingua: {{tt|ia|tau}}
* Italian: {{tt+|it|tau|m|f}}
* Japanese: {{tt+|ja|タウ|tr=tau}}
* Korean: {{tt+|ko|타우}}
* Malay: {{tt+|ms|tau}}
* Norwegian:
*: Bokmål: {{tt+|nb|tau|n}}
*: Nynorsk: {{tt|nn|tau|n}}
* Polish: {{tt+|pl|tau|n}}
* Portuguese: {{tt+|pt|tau|m}}
* Russian: {{tt+|ru|тау|n}}
* Spanish: {{tt+|es|tau|f}}
* Swedish: {{tt+|sv|tau|n}}
* Thai: {{tt+|th|เทา}}
* Ukrainian: {{tt|uk|тау|n}}
* Welsh: {{tt|cy|tau|f}}
{{trans-bottom}}

{{trans-see|a letter of many Semitic alphabets|taw}}

{{trans-top|{{lang|grc|Τ}}-shaped object or sign}}
{{trans-bottom}}

{{trans-top|crosier with a {{lang|grc|Τ}}-shaped head}}
{{trans-bottom}}

{{trans-top-also|Saint Anthony’s cross|Saint Anthony's cross}}
* French: {{tt|fr|croix en tau|f}}
* German: {{tt+|de|Taukreuz|n}}
{{trans-bottom}}

{{trans-see|ankh symbol|ankh}}

{{trans-top|''used to designate the nineteenth (usually the nineteenth brightest) star in a constellation''}}
{{trans-bottom}}

{{trans-top|irrational and transcendental constant equal to twice the value of pi}}
{{trans-bottom}}

{{trans-top-also|''short for'' tau protein|tau protein}}
* French: {{tt+|fr|tau|f}}
{{trans-bottom}}

{{trans-see|''short for'' tau lepton ''or'' tau particle|tauon}}

{{trans-top-also|''short for'' tau meson|kaon}}
{{trans-bottom}}
}}

===See also===
{{list:Greek script letter names/en}}
{{col|en|tau-saghyz|tau yu bak}}

===References===
<references/>

===Further reading===
* {{pedia}}
* {{pedia|tau cross}}
* {{pedia|tau (particle)}}
* {{pedia|tau protein}}
* {{pedia|turn (angle)}}
* {{pedia|tau (disambiguation)}}

===Anagrams===
* {{anagrams|en|a=atu|AUT|UAT|UTA|Uta|aut-|uta}}

{{cln|en|terms derived from the shape of letters|sort=τ}}
{{C|en|Greek letter names|Leptons}}

=='Are'are==

===Verb===
{{head|alu|verbs}}

# to [[give]]

===References===
* Kateřina Naitoro, ''[https://web.archive.org/web/20171128171844/https://core.ac.uk/download/pdf/35469715.pdf#page=100 A Sketch Grammar of 'Are'are: The Sound System and Morpho-Syntax]'' (2013)

==Catalan==

===Pronunciation===
* {{ca-IPA}}
* {{rhymes|ca|aw|s=1}}

===Noun===
{{ca-noun|f}}

# [[tau#English|Tau]]; the [[Appendix:Greek alphabet|Greek]] letter [[Τ]] (lowercase [[τ]])
# [[tav]]; the [[Appendix:Hebrew alphabet|Hebrew]] letter {{lang|und|[[ת|ת]]}}
# {{lb|ca|religion}} a [[tau cross]]

{{C|ca|Greek letter names|Hebrew letter names}}

==Czech==

===Pronunciation===
* {{cs-IPA}}

===Noun===
{{cs-noun|n|indecl=1}}

# {{l|en|tau}} {{gloss|Greek letter}}

===Further reading===
* {{R:cs:KNLA}}
* {{R:cs:ASCS}}

{{C|cs|Greek letter names}}

==Dutch==

===Etymology===
From {{inh|nl|dum|tau}}, {{m|dum|thau}}, from {{der|nl|grc|ταῦ}}. {{doublet|nl|taw}}, {{m|nl|tav}}.

===Pronunciation===
* {{audio|nl|Nl-tau.ogg}}

===Noun===
{{nl-noun|n|-s|+}}

# {{C|nl|Greek letter names}} {{l|en|tau}} (Greek letter)

===Further reading===
* {{pedia|lang=nl|tau (letter)}}

==Finnish==

===Etymology===
Borrowed from {{bor|fi|grc|ταῦ}}.
{{enum|fi|sigma|ypsilon|Greek letter|Ττ}}
{{wikipedia|lang=fi|Tau}}

===Pronunciation===
{{fi-pronunciation}}

===Noun===
{{fi-noun}}

# [[#English|tau]] {{gloss|Greek letter}}
# [[tauon]], [[#English|tau]] {{gloss|elementary particle}}

====Declension====
{{fi-decl-rosé|tau|a|ill_sg_vowel=u}}

====Derived terms====
{{col|fi|title=compounds
|antitau
}}

===Further reading===
* {{R:KTSK|accessdate=2023-07-03}}

===Anagrams===
* {{anagrams|fi|a=atu|-tua}}

{{cln|fi|3-letter words}}
{{C|fi|Greek letter names|Subatomic particles}}

==French==

===Alternative forms===
* {{lb|fr|in the plural}} {{alt|fr|taus}} {{qualifier|1990 spelling reform}}

===Pronunciation===
* {{fr-IPA}}
* {{audio|fr|Fr-Paris--tau.ogg|a=Paris}}
* {{homophones|fr|taus|taux|tôt}}

===Noun===
{{fr-noun|m|#|s}}

# {{l|en|tau}} {{gloss|Greek letter}}
# {{lb|fr|particle}} {{l|en|tau}}, [[tauon]]

====Derived terms====
* {{l|fr|tauique}}

===Further reading===
* {{R:fr:TLFi}}

===Anagrams===
* {{l|fr|tua}}

{{C|fr|Greek letter names}}
{{cln|fr|nouns with plural in -aus}}

==Galician==

===Pronunciation===
{{gl-pr}}
* {{hyphenation|gl|tau}}

===Noun===
{{gl-noun|m}}

# {{l|en|tau}} {{gloss|name of the Greek letter Τ, τ}}

===References===
* {{R:gl:DRAG}}

==German Low German==

===Alternative forms===
* {{l|nds-de|to}} {{q|in some dialects}}

===Etymology===
{{inh|nds-de|gml|to|tô}}.

===Preposition===
{{head|nds-de|prepositions}}

# {{lb|nds-de|in some dialects}} [[to]]

====Derived terms====
* {{l|nds-de|taum}}
* {{l|nds-de|taun}}
* {{l|nds-de|taur}}

==Hokkien==
{{zh-see|兜|poj}}
{{zh-see|掜|poj}}
{{zh-see|㨮|poj}}
{{zh-see|兜|poj}}

==Huichol==

===Noun===
{{head|hch|nouns}}

# {{topics|hch|Astronomy}} [[sun]]

==Hungarian==
{{wikipedia|lang=hu}}

===Etymology===
From {{der|hu|grc|ταῦ}}.

===Pronunciation===
* {{hu-IPA}}
* {{hyphenation|hu|tau}}
* {{rhymes|hu|u|s=2}}

===Noun===
{{hu-noun|k}}

# [[#English|tau]] (Greek letter)

====Declension====
{{hu-infl-nom|tau|o}}{{hu-pos-tok|tau}}

{{cln|hu|3-letter words}}
{{topics|hu|Greek letter names}}

==Iban==
{{rfc|iba|this means "ought, should" but it's listed as an alternative form in {{m|iba|tauk}} which in that entry it means "to know"}}

===Pronunciation===
* {{IPA|iba|/tauʔ/}}

===Verb===
{{head|iba|verbs}}

# [[ought]], [[should]]

==Icelandic==

===Etymology===
{{bor+|is|da|tøj}}.

===Pronunciation===
* {{IPA|is|/tʰøyː/}}
* {{rhymes|is|øyː|s=1}}

===Noun===
{{is-noun|@@}}

# [[fabric]]
# [[clothing]]

====Declension====
{{is-ndecl|n.sg}}

==Indonesian==

===Pronunciation===
{{id-pr|ta.u|rhyme=0}}

===Etymology 1===

====Verb====
{{head|id|verb}}

# {{lb|id|colloquial}} {{alt form|id|tahu|t=to [[know]]}}

===Etymology 2===
{{lbor|id|grc|ταῦ}}.

====Noun====
{{head|id|noun}}

# [[tau#Noun|tau]] {{gl|the [[letter#Noun|letter]] {{m|grc|Τ//τ|tr=-}} in the [[Greek#Adjective|Greek]] [[alphabet#Noun|alphabet]]; being the [[nineteenth]] letter of the [[Classical Greek|Classical]] and [[Modern Greek]], and the [[twenty-first]] letter of the [[Old Greek|Old]] and [[Ancient Greek]] alphabets}}

==Italian==
{{wikipedia|lang=it}}

===Pronunciation===
{{it-pr|tàu}}

===Noun===
{{it-noun|mf|#}}

# {{l|en|tau}} (Greek letter)

===Anagrams===
* {{anagrams|it|a=atu|-uta|tua}}

{{C|it|Greek letter names}}

==Japanese==

===Romanization===
{{ja-romaji}}

# {{ja-romanization of|たう}}

==Kambera==

===Verb===
{{head|xbr|noun}}

# [[person]]
#: {{ux|xbr|na '''tau''' na pa-hi dà[[-nggu]]|the '''person''' that I cried with}}

===References===
* {{klamer 1998|page=328}}

==Kapampangan==

===Alternative forms===
* {{alt|pam|tauo||Abecedario|obsolete}}
* {{alt|pam|tawu||Súlat Wáwâ}}

===Etymology 1===
From {{inh|pam|phi-pro|*tau}}, from {{inh|pam|poz-pro|*tau}}, from {{inh|pam|map-pro|*Cau}}.

====Pronunciation====
* {{pam-IPA|tá.u}}
* {{hyph|pam|ta|u}}

====Noun====
{{pam-noun|táu}}

# [[person]]; [[human]]; [[man]]
# [[someone]]; [[people]]; [[human being]] 
# [[boyfriend]]; [[girlfriend]]; [[lover]]

===Etymology 2===

====Pronunciation====
* {{pam-IPA|ta.ú}}
* {{hyph|pam|ta|u}}

====Noun====
{{pam-noun|taú}}

# [[feast]]; [[party]]; [[banquet]]

==Kendayan==

===Numeral===
{{head|knx|numeral}}

# [[three]]

==Lithuanian==

===Pronoun===
{{head|lt|pronoun form}}

# {{infl of|lt|tu||2s|dat}}

==Makasar==

===Pronunciation===
* {{IPA|mak|/ˈtau/|[ˈt̪ʰa.u]}} 
* {{hyphenation|mak|ta|u}}

===Etymology 1===
From {{inh+|mak|poz-ssw-pro|*tau}}, from {{inh|mak|poz-pro|*tau}}, from {{inh|mak|map-pro|*Cau}}.

====Noun====
{{mak-noun}}

# {{l|en|people}}, {{l|en|person}}, {{l|en|man}}
# {{l|en|slave}}, {{l|en|laborer}}, {{l|en|coolie}}

=====Affixations=====
{{col4|mak|
| tau-tau
| tauang
| katauang
| attau
| pattauang
| pattau toàng
}}

=====Compounds=====
{{col4|mak|
| rupa tau
| tannga tau
| tau romang
}}

===Etymology 2===
{{inh+|mak|poz-pro|*taqu}}, from {{inh|mak|map-pro|*Caqu|t=to know how, be able to, be skilled at  }}.

====Adjective====
{{mak-noun}}

# {{l|en|friendly}}, {{l|en|amicably}}, being familiar with someone.
# {{l|en|tame}}, {{l|en|domesticated}}

=====Affixations=====
{{col4|mak|
| appattau
| tauang
| pakatau
| pakatauang
}}

====Root====
{{mak-root}}

# {{rfdef|mak}}

=====Affixations=====
{{col4|mak|
| pattau
| appattau
| pattauang
}}

===Further reading===
* {{cite-book|title=Makassaars-Nederlands woordenboek|author=A. A. Cense|url=https://brill.com/display/title/23511|publisher=Brill|year=2024|doi=10.1163/9789004653115}}

==Malay==

===Alternative forms===
* {{l|ms|tahu}}
* {{l|ms|تاهو}}

===Etymology 1===
From {{inh|ms|poz-mly-pro|*tahu(ʔ)}}, from {{inh|ms|poz-mcm-pro|-}}, from {{inh|ms|poz-msa-pro|-}}, from {{inh|ms|poz-pro|*taqu}}, from {{inh|ms|map-pro|*Caqu}}.

====Pronunciation====
* {{IPA|ms|/tau/|a=Kedah}}
* {{IPA|ms|/ta.u/}}
* {{rhymes|ms|au|u}}

====Verb====
{{head|ms|verb}}

# {{lb|ms|informal}} {{alt form|ms|tahu|t=to know}}

===Etymology 2===
Borrowed from {{bor|ms|en|tau}}, from {{bor|ms|grc|ταῦ}}.

====Pronunciation====
* {{IPA|ms|/tau/}}

====Noun====
{{ms-noun|j=تاو}}

# the [[Greek#English|Greek]] letter [[#English|tau]] ([[Τ]] or [[τ]])

===Further reading===
* {{R:PRPM}}

{{C|ms|Thinking}}

==Maori==

===Etymology 1===
From {{der|mi|poz-pol-pro|*taqu}} (compare {{cog|haw|kau}}), from {{der|mi|poz-oce-pro|-}}, from {{der|mi|poz-pro|*taqun}} (compare {{cog|ms|tahun}}, {{cog|tl|taon|taón}}).

====Noun====
{{mi-noun}}

# [[year]] {{gloss|time it takes for the Earth to complete one revolution of the Sun}}
# [[year]] {{gloss|time it takes for any planetary body to make one revolution around another body}}
# [[year]] {{gloss|a period between set dates that mark a year}}
# [[year]] {{gloss|scheduled part of a calendar year spent in a specific activity}}
# [[year]] {{gloss|Julian year}}
# [[year]] {{gloss|level or grade at school or college}}

===Etymology 2===
From {{der|mi|poz-pol-pro|*tau}}, from {{der|mi|poz-oce-pro|-}}, from {{der|mi|poz-pro|*taʀuq}} (compare {{cog|ms|taruh}}).

====Verb====
{{mi-verb}}

# to [[settle]]

===Etymology 3===
From {{inh|mi|poz-pol-pro|*tau}}, from {{inh|mi|poz-oce-pro|-}}, from {{inh|mi|poz-pro|*taqu}}, from {{inh|mi|map-pro|*Caqu}} (compare {{cog|ms|tahu}}).

====Noun====
{{head|mi|noun|used in the form|mātau}}

# [[knowledge]]

====Verb====
{{head|mi|verb|used in the form|mātau}}

# {{lb|mi|stative}} to [[know]]

===References===
* {{R:Te Aka 3}}

{{C|mi|Sciences|Thinking|Time}}

==Minangkabau==

===Etymology===
From {{inh|min|poz-mly-pro|*tahu(ʔ)}}, from {{inh|min|poz-pro|*taqu}}, from {{inh|min|map-pro|*Caqu}}.

===Verb===
{{head|min|verb}}

# to [[know]]

===Further reading===
* {{R:map:ACD|Caqu}}

{{C|min|Thinking}}

==Niuean==

===Etymology 1===
From {{inh|niu|poz-pol-pro|*taqu}}, from {{inh|niu|poz-oce-pro|-}}, from {{inh|niu|poz-pro|*taqun}}.

====Noun====
{{head|niu|noun}}

# [[year]]

===Etymology 2===
From {{inh|niu|poz-pol-pro|*tau}}, from {{inh|niu|poz-oce-pro|-}}, from {{inh|niu|poz-pro|*taʀuŋ}}.

====Verb====
{{head|niu|verb}}

# [[fight]]

{{C|niu|Time}}

==North Frisian==
{{number box|frr|2}}
{{cardinalbox|frr|1|2|3|jen|trii|ord=taust|headlink=Sylt}}

===Pronunciation===
* {{IPA|frr|[tʰaʊ̯]}}

===Etymology 1===
From {{der|frr|ofs|twene|twā}}.

====Numeral====
{{head|frr|numeral}} {{lb|frr|Föhr-Amrum|Sylt|Helgoland}}

# [[two]]

=====Alternative forms=====
* {{alt|frr|twäär||Mooring}}

=====Coordinate terms=====
{{frr-f-cardinals}}

===Etymology 2===
From {{inh|frr|gem-pro|*þwahaną}}.

====Verb====
{{head|frr|verb}}

# {{lb|frr|Föhr-Amrum}} to [[wash]]

=====Conjugation=====
{{frr-FoehrAmrum-conj-table|inf_2=tauen|ppp=twaanjen|pres_2=twaist|pres_3=twait|past_1=twuch|past_2=twuchst}}

=====Alternative forms=====
* {{alt|frr|taui||Sylt}}
* {{alt|frr|tüünj||Mooring}}

{{cln|frr|cardinal numbers}}

==Norwegian Bokmål==
{{wikipedia|lang=no}}

===Etymology 1===
From {{der|nb|non|tog}} {{q|rope}}.

====Noun====
{{nb-noun-n1}}

# a [[rope]]
# {{lb|nb|physics}} {{l|en|tau}} lepton
# {{l|en|tau}} (Greek letter)

=====Synonyms=====
* {{sense|rope}} {{l|nb|rep}}, {{l|nb|reip}}

=====Derived terms=====
* {{l|nb|ståltau}}
* {{l|nb|taubane}}
* {{l|nb|tauverk}}

===Etymology 2===

====Verb====
{{head|nb|verb form}}

# {{infl of|nb|taue||imp}}

===References===
* {{R:The Bokmål Dictionary}}

{{C|nb|Greek letter names}}

==Norwegian Nynorsk==
{{wikipedia|lang=nn}}

===Etymology 1===
{{root|nn|ine-pro|*dewk-}}
From earlier and {{inh|nn|non|tog||rope}}, from {{inh|nn|gem-pro|*taugō}}.

====Alternative forms====
* {{alt|nn|tog||[[WT:Norwegian Nynorsk spelling reforms|superseded]]}}

====Noun====
{{nn-noun-n1}}

# a [[rope]]

=====Synonyms=====
* {{s|rope}} {{l|nn|reip}}

=====Derived terms=====
* {{l|nn|ståltau}}
* {{l|nn|taubane}}
* {{l|nn|tauverk}}

===Etymology 2===
{{wikipedia|lang=nn|Bokstaven tau}}
Borrowed from {{bor|nn|grc|ταῦ}}.

====Noun====
{{nn-noun-m1}}

# {{l|en|tau}}: The letter [[Τ]]/[[τ]] in the Greek, Hebrew and ancient Semitic alphabets, being the nineteenth letter of the [[Classical Greek|Classical]] and [[Modern Greek]], the twenty-first letter of [[Old Greek|Old]] and [[Ancient Greek|Ancient]] Greek.
# {{lb|nn|physics}} {{l|en|tau}} [[lepton]]

===References===
* {{R:The Nynorsk Dictionary}}

===Anagrams===
* {{anagrams|nn|a=atu|Tau|tua}}

{{C|nn|Greek letter names}}

==Occitan==

===Etymology===
From {{inh|oc|la|talis}}.

===Pronunciation===
* {{IPA|oc|/taw/}}
* {{audio|oc|LL-Q35735-Davidgrosclaude-tau.wav}}

===Adjective===
{{oc-adj|f=tala}}

# {{lb|oc|Gascon|Provençal|Limousin|Vivaro-alpine|Auvergnat}} [[such]]

====Alternative forms====
* {{l|oc|tal}}

==Polish==
{{wp|lang=pl}}

===Etymology===
{{lbor|pl|grc|ταῦ}}, from {{der|pl|phn|𐤕|ts=taw}}.

===Pronunciation===
{{pl-pr|a=LL-Q809 (pol)-Olaf-tau.wav}}

===Noun===
{{pl-noun|n|indecl=yes}}

# {{l|en|tau}} {{gl|Greek letter Τ, τ}}

===Further reading===
* {{R:pl:PWN}}

{{C|pl|Greek letter names}}

==Portuguese==

===Pronunciation===
{{pt-IPA}}
* {{homophones|pt|tal|qq1=Brazil}}
* {{rhymes|pt|aw|s=1}}
* {{hyphenation|pt|tau}}

===Noun===
{{pt-noun|m}}

# {{l|en|tau}} {{gloss|name of the Greek letter Τ, τ}}
# {{lb|pt|particle}} [[tauon]]

==Sotho==

===Noun===
{{st-noun|9|10|ditau}}

# [[lion]]

====Descendants====
* {{desc|bor=1|bnt-phu|idawû}}

{{C|st|Mammals}}

==Spanish==

===Pronunciation===
{{es-pr|+<audio:LL-Q1321 (spa)-AdrianAbdulBaha-tau.wav<a:Colombia>>}}

===Noun===
{{es-noun|f}}

# {{l|en|tau}}; the Greek letter [[Τ]], [[τ]]
# [[tauon]] {{gl|elementary particle}}
#: {{syn|es|tauón}}

===See also===
{{list:Greek script letter names/es}}
{{list:leptons/es}}

===Further reading===
* {{R:es:DRAE}}

{{C|es|Subatomic particles}}

==Tagalog==

===Pronoun===
{{tl-pron|b=tayo}} {{tlb|tl|text messaging}}

# {{abbr of|tl|tayo}}

==Tahitian==

===Adjective===
{{head|ty|adjective}}

# [[some]]

====Synonyms====
* {{l|ty|nau}}

====References====
* {{R:LTC}}
* {{R:TahitianAcademy}}

==Tausug==

===Etymology===
From {{inh|tsg|poz-pro|*tau}}.

===Pronunciation===
{{tsg-pr}}

===Noun===
{{tsg-noun|j=+}}

# [[person]]
# [[human]]

====Derived terms====
{{col3|tsg|pagkatau|Tausūg}}

==Ternate==

===Pronunciation===
* {{IPA|tft|[ˈta.u]}}

===Verb===
{{tft-verb}}

# to [[pull]]

====Conjugation====
{{tft-conj}}

===References===
* {{R:tft:Hayami-Allen:2001}}

==Tetum==

===Etymology===
From {{inh|tet|poz-pro|*taʀuq}}, compare {{cog|mi|tau}} and {{cog|id|taruh}}.

===Verb===
{{head|tet|verb}}

# to [[put]], to [[place]]

==Tocharian B==

===Etymology===
From {{bor|txb|ltc|-}} {{ltc-l|斗}}.<ref>{{R:txb:Adams:1999|tau}}</ref><ref>{{quote-book|1=en|year=2003|editors=Bauer, Brigitte L.M.; Pinault, Georges-Jean|last1=Lubotsky|first1=Alexander|last2=Starostin|first2=Sergey|title=Language in Time and Space: A Festschrift for Werner Winter on the Occasion of his 80th Birthday|chapter=Turkic and Chinese loan words in Tocharian|chapterurl=https://www.academia.edu/428988|pages=257-269}}</ref>

===Noun===
{{head|txb|noun|g=?-s|irregular plural|towä|or|tom|or|taum}}

# a [[dry measure]], roughly equivalent to ten [[quart|quarts]] or 1.25 [[peck|pecks]]

===References===
<references/>

{{topics|txb|Units of measure}}

==Tokelauan==

===Pronunciation===
* {{tkl-IPA|'tau}}
* {{hyph|tkl|ta|u}}

===Etymology 1===
From {{inh|tkl|poz-pol-pro|*te-qa-u}}.

====Determiner====
{{head|tkl|determiner|cat2=possessive determiners}}

# {{lb|tkl|alienable|definite}} [[thy]], [[your]]

=====See also=====
{{tkl-possessive determiners}}

===Etymology 2===
{{dercat|tkl|poz-oce-pro|inh=1}}
From {{inh|tkl|poz-pol-pro|*taqu}}. Cognates include {{cog|haw|kau}} and {{cog|sm|tau}}.

====Noun====
{{head|tkl|noun}}

# [[season]]
# [[weather]]
# [[climate]]

===Etymology 3===
From {{inh|tkl|poz-pol-pro|*tau}}. Cognates include {{cog|to|tou}} and {{cog|sm|tau}}.

====Verb====
{{head|tkl|verb}}

# {{lb|tkl|transitive}} to [[pick]]

=====Usage notes=====
* '''''tau''''' is used to refer to flowers and fruits, with the exception of the [[coconut]] and [[pandanus]].

===Etymology 4===
From {{inh|tkl|poz-pol-pro|*tau}}. Cognates include {{cog|to|tau}} and {{cog|sm|tau}}.

====Verb====
{{head|tkl|verb}}

# {{lb|tkl|intransitive}} to [[fight]]; to [[quarrel]]
# {{lb|tkl|intransitive}} to [[compete]]

===Etymology 5===
{{dercat|tkl|poz-oce-pro|poz-cet-pro|pqe-pro|poz-pro|inh=4}}
From {{inh|tkl|poz-pol-pro|*tau}}. Cognates include {{cog|mi|tau}} and {{cog|sm|tau}}.

====Verb====
{{head|tkl|verb|plural|tatau}}

# {{lb|tkl|intransitive}} to [[hit]]
# {{lb|tkl|intransitive}} to [[land]]
# {{lb|tkl|intransitive}} to [[arrive]]
# {{lb|tkl|intransitive}} to [[anchor]]
# {{lb|tkl|intransitive|of fish}} to [[settle down]]

===Etymology 6===
From {{inh|tkl|poz-pol-pro|*tau}}. Cognates include {{cog|tvl|tau}} and {{cog|sm|tau}}.

====Verb====
{{head|tkl|verb}}

# {{lb|tkl|transitive|of months}} to [[count]]

===Etymology 7===
{{dercat|tkl|poz-oce-pro|inh=1}}
From {{inh|tkl|poz-pol-pro|*tau}}. Cognates include {{cog|ray|tau}} and {{cog|sm|tau}}.

====Noun====
{{head|tkl|noun}}

# The point where the keel meets the stern of the canoe.

===Etymology 8===

====Noun====
{{head|tkl|noun}}

# Fresh [[nest fern]] leaves, used to cover a traditional oven.

===Etymology 9===

====Particle====
{{head|tkl|particle}}

# {{n-g|Used to indicate the exclusiveness of the following noun or pronoun}}; [[just]], [[only]], [[merely]]

===Etymology 10===

====Particle====
{{head|tkl|particle}}

# {{n-g|Used to indicate the focus lies on the following noun}}; [[concerning]], [[regarding]]

===Etymology 11===

====Particle====
{{head|tkl|particle}}

# {{n-g|Used to indicate that the action of the following verb is beginning}}; [[starting]] to; [[beginning]] to

===Etymology 12===

====Verb====
{{head|tkl|verb}}

# {{only used in|tkl|tau ma|t=to be fed up with}}

===References===
* {{R:tkl:TD|page=342}}

{{C|tkl|Atmosphere|Agriculture|Violence|Watercraft}}

==Tongan==

===Etymology===
From {{der|to|poz-pol-pro|*tau}}, from {{der|to|poz-pro|*taʀuŋ}}.

===Pronunciation===
{{to-IPA}}

===Verb===
{{head|to|verb}}

# [[fight]]

==Tswana==

===Pronunciation===
* {{IPA|tn|/tà.ú/}}

===Noun===
{{tn-noun|pl=ditau|cl=9/10}}

# [[lion]]

{{C|tn|Mammals}}

==Vietnamese==

===Pronunciation===
* {{IPA|vi|[taw˧˥]|a=[[w:Vinh|Vinh]]}}
{{vi-IPA}}

===Pronoun===
{{vi-pronoun}}

# {{alternative form of|vi|tao||I/me|from=North Central Vietnam}}

===Anagrams===
* {{anagrams|vi|tua}}

{{cln|vi|first person pronouns}}

==Welsh==

===Pronunciation===
* {{IPA|cy|/taɨ̯/|a=cy-N}}
* {{IPA|cy|/tai̞/|a=cy-S}}

===Verb===
{{cy-verb form}}

# {{lb|cy|literary}} {{inflection of|cy|tewi||3|s|pres:ind//fut}}

===Mutation===
{{cy-mut}}

==White Hmong==

===Etymology===
From {{inh|mww|hmx-pro|*təuk}}, from {{bor|mww|och|-}} {{och-l|得}}.<ref>{{R:hmx-pro:Ratliff 2010|pages=254; 283}}</ref>

===Pronunciation===
{{mww-pron}}

===Verb===
{{head|mww|verb}}

# to [[get]], [[gain]], [[obtain]]
# {{lb|mww|used preverbally}} ''[[perfective]] [[action]] [[marker]]''
#: {{uxi|mww|Kuv tsis tau ua.|I didn't do that.}}
# {{lb|mww|used postverbally}} ''[[potential]] [[mood]] marker''
#: {{uxi|mww|Ua tau.|May be done.}}

===References===
* {{R:mww:Heimbach}}
<references />

==Woccon==

===Noun===
{{head|xwc|noun}}

# [[fire]]