optach

Irish

Etymology

From Medieval Latin opticus, from Ancient Greek ὀπτικός (optikós, “of seeing”). Partially calqued, substituting the native adjectival suffix -ach.

Pronunciation

• (Connacht) IPA^(key): /ˈɔpˠt̪ˠəx/
• (Ulster) IPA^(key): /ˈɔpˠt̪ˠa(x)/

Adjective

optach (genitive singular masculine optaigh, genitive singular feminine optaí, plural optacha)

1. optic

Declension

Declension of optach

	singular		plural (m/f)
Positive	masculine	feminine	(strong noun)	(weak noun)
nominative	optach	optach	optacha
vocative	optaigh		optacha
genitive		optaí	optacha	optach
dative	optach	optach; optaigh (archaic)	optacha
Comparative	níos optaí
Superlative	is optaí

Related terms

• opta- (“opto-”)
• optaic f (“optics”)
• optúil (“optical”, adjective)

Mutation

Mutated forms of optach

radical	eclipsis	with h-prothesis	with t-prothesis
optach	n-optach	hoptach	not applicable

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

Further reading

• Ó Dónaill, Niall (1977) “optach”, in Foclóir Gaeilge–Béarla, Dublin: An Gúm, →ISBN
• de Bhaldraithe, Tomás (1959) “optach”, in English-Irish Dictionary, An Gúm
• “optach”, in New English-Irish Dictionary, Foras na Gaeilge, 2013-2025