deartháir

Irish

Alternative forms

• dearbh-bhráthair (obsolete)
• dearbhráthair (obsolete)
• driotháir

Etymology

PIE word
*dóru

PIE word
*bʰréh₂tēr

From Old Irish derbráthair, from derb (“certain”) + bráthair (“brother”), from Proto-Celtic *brātīr, from Proto-Indo-European *bʰréh₂tēr.

Pronunciation

• (Munster) IPA^(key): /dʲɾʲəˈhaːɾʲ/ (as if spelled dreatháir)
• (Aran) IPA^(key): /ˈdʲɾʲɑːhərʲ/ (as if spelled dreáthair)
• (Cois Fharraige) IPA^(key): /ˈdʲɾʲɑːɾʲ/ (as if spelled dreáir)
• (West Connemara, South Mayo, Erris) IPA^(key): /ˈdʲɾʲiçaːɾʲ/ (as if spelled dricheáir)
• (Achill) IPA^(key): /ˈdʲaɾˠhaɾʲ/ (as if spelled dearthair)
• (Ulster) IPA^(key): /ˈdʲæːɾˠhaɾʲ/, /ˈdʲæːɾˠhəɾʲ/ (as if spelled deártháir or deárthair)

Noun

deartháir m (genitive singular dearthár, nominative plural deartháireacha)

1. brother

Declension

Declension of deartháir

Irregular

Bare forms Case Singular Plural Nominative deartháir deartháireacha Vocative a dheartháir a dheartháireacha Genitive dearthár deartháireacha Dative deartháir deartháireacha

Forms with the definite article Case Singular Plural Nominative an deartháir na deartháireacha Genitive an dearthár na ndeartháireacha Dative leis an deartháir don deartháir leis na deartháireacha

• Alternative plural: deartháracha (Cois Fharraige)

Coordinate terms

• deirfiúr (“sister”)

Mutation

Irish mutation
Radical	Lenition	Eclipsis
deartháir	dheartháir	ndeartháir
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.

Further reading

• Gregory Toner, Sharon Arbuthnot, Máire Ní Mhaonaigh, Marie-Luise Theuerkauf, Dagmar Wodtko, editors (2019), “derbráthair”, in eDIL: Electronic Dictionary of the Irish Language
• Dinneen, Patrick S. (1904) “dearḃráṫair”, in Foclóir Gaeḋilge agus Béarla, 1st edition, Dublin: Irish Texts Society, page 230
• Ó Dónaill, Niall (1977) “deartháir”, in Foclóir Gaeilge–Béarla, Dublin: An Gúm, →ISBN
• de Bhaldraithe, Tomás (1959) “deartháir”, in English-Irish Dictionary, An Gúm
• “deartháir”, in New English-Irish Dictionary, Foras na Gaeilge, 2013-2024