ceathrú

Irish

**Irish numbers ^(edit)**
	40^{[a], [b]}
^{[a], [b]} ← 3	4	5 →
Cardinal: ceathair Ordinal: ceathrú Ordinal abbreviation: 4ú Personal: ceathrar Attributive: ceithre

From Old Irish cethramad (“fourth”),^[5] from cethair (“four”). By surface analysis, ceathair +‎ -ú.

ceathrú (triggers h-prothesis of a following vowel)

From Old Irish cethramthu.^[6]

ceathrú f (genitive singular ceathrún, nominative plural ceathrúna or ceathrúnaí)

a quarter (fourth part; quarter of an hour)
ceathrú chun a trí ― a quarter to three

ceathrú tar éis a trí ― a quarter past three
quarter (section of a town)
quarters (housing, barracks)
thigh
Synonym: leis

Declension of ceathrú (fifth declension)

bare forms
	singular	plural
nominative	ceathrú	ceathrúna
vocative	a cheathrú	a cheathrúna
genitive	ceathrún	ceathrúna
dative	ceathrú ceathrúin (in certain phrases)	ceathrúna

forms with the definite article
	singular	plural
nominative	an cheathrú	na ceathrúna
genitive	na ceathrún	na gceathrúna
dative	leis an gceathrú don cheathrú	leis na ceathrúna

Mutated forms of *ceathrú*
radical	lenition	eclipsis
ceathrú	cheathrú	gceathrú

Note: Certain mutated forms of some words can never occur in standard Modern Irish.
All possible mutated forms are displayed for convenience.

^ Sjoestedt, M. L. (1931), Phonétique d’un parler irlandais de Kerry [Phonetics of an Irish Dialect of Kerry] (in French), Paris: Librairie Ernest Leroux, § 221, page 112
^ Finck, F. N. (1899), Die araner mundart [The Aran Dialect] (in German), Zweiter Band: Wörterbuch [Second volume: Dictionary], Marburg: Elwert’sche Verlagsbuchhandlung, page 170
^ de Bhaldraithe, Tomás (1975), The Irish of Cois Fhairrge, Co. Galway: A Phonetic Study, revised edition, Dublin Institute for Advanced Studies, § 547, page 102
^ Quiggin, E. C. (1906), A Dialect of Donegal, Cambridge University Press, § 279, page 98
^ Gregory Toner, Sharon Arbuthnot, Máire Ní Mhaonaigh, Marie-Luise Theuerkauf, Dagmar Wodtko, editors (2019), “cethramad”, in eDIL: Electronic Dictionary of the Irish Language
^ Gregory Toner, Sharon Arbuthnot, Máire Ní Mhaonaigh, Marie-Luise Theuerkauf, Dagmar Wodtko, editors (2019), “cethramthu”, in eDIL: Electronic Dictionary of the Irish Language

Dinneen, Patrick S. (1927), “ceaṫraṁa”, in Foclóir Gaeḋilge agus Béarla, 2nd edition, Dublin: Irish Texts Society, page 182; reprinted with additions 1996, →ISBN
Dinneen, Patrick S. (1927), “ceaṫraṁaḋ”, in Foclóir Gaeḋilge agus Béarla, 2nd edition, Dublin: Irish Texts Society, page 183; reprinted with additions 1996, →ISBN
“ceathrú”, in New English-Irish Dictionary, Foras na Gaeilge, 2013–2026, retrieved 24 May 2024
de Bhaldraithe, Tomás (1959), “ceathrú”, in English-Irish Dictionary, An Gúm, retrieved 24 May 2024
Ó Dónaill, Niall (1977), “ceathrú”, in Foclóir Gaeilge–Béarla, Dublin: An Gúm, →ISBN, retrieved 24 May 2024
Ó Dónaill, Niall; Ua Maoileoin, Pádraig (1991), “ceathrú”, in An Foclóir Beag (in Irish), Dublin: An Gúm, retrieved 24 May 2024