ceathrú

Irish

Alternative forms

Etymology

From Old Irish cethramad (“fourth”), from cethair (“four”). Synchronically analyzable as ceathair +‎ -ú.

Pronunciation
  • (Munster) IPA(key): /cahˈɾˠuː/, /caˈɾˠuː/, /caɾˠˈhuː/
  • (Connacht) IPA(key): /ˈcahɾˠuː/, /ˈcaɾˠuː/, /ˈcaɾˠhuː/
  • (Cois Fharraige) IPA(key): /ˈcæɾˠuː/
  • (Ulster) IPA(key): /ˈcahɾˠu/, /ˈcaɾˠu/, /ˈcaɾˠhu/

Noun

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

  1. a quarter
    ceathrú chun a trí ― a quarter to three
    ceathrú tar éis a trí ― a quarter past three
  2. thigh
    Synonym: leis

Declension
Declension of ceathrú

Fifth declension

Bare forms

Case 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

Case Singular Plural
Nominative an cheathrú na ceathrúna
Genitive na ceathrún na gceathrúna
Dative leis an gceathrú

don cheathrú

 leis na ceathrúna

Derived terms
  • ceathrú bhagúin (“ham”)
  • deic cheathrún f, tile ceathrún m (“quarterdeck”)

Adjective

ceathrú (triggers h-prothesis of a following vowel)

  1. fourth

Mutation
Irish mutation
Radical Lenition Eclipsis
ceathrú cheathrú gceathrú
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.

Further reading
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