tiach

Irish

Alternative forms

• tiagh

Etymology

From Old Irish tíag (“wallet, satchel”), from Latin thēca (“case, envelope, sheath”), from Ancient Greek θήκη (thḗkē, “a case, box, receptacle”), from τίθημι (títhēmi, “put, set, place”).

Noun

tiach f (genitive singular téiche, nominative plural tiacha)

1. (dated) knapsack, satchel
2. (microbiology) theca

Declension

Declension of tiach

Second declension

Bare forms Case Singular Plural Nominative tiach tiacha Vocative a thiach a thiacha Genitive téiche tiach Dative tiach téich (archaic, dialectal) tiacha

Forms with the definite article Case Singular Plural Nominative an tiach na tiacha Genitive na téiche na dtiach Dative leis an tiach leis an téich (archaic, dialectal) don tiach don téich (archaic, dialectal) leis na tiacha

Derived terms

• hipithiach
• tiachán
• tiachóg

Mutation

Irish mutation
Radical	Lenition	Eclipsis
tiach	thiach	dtiach
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.

Further reading

• Dinneen, Patrick S. (1927) “tiach”, in Foclóir Gaeḋilge agus Béarla, 2nd edition, Dublin: Irish Texts Society
• “tiach”, in The National Terminology Database for Irish, Fiontar & Scoil na Gaeilge, DCU and Foras na Gaeilge, 2006–2024