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seachtain

week

NounFeminineA1/ˈʃaxt̪ˠənʲ/

"seachtain" means "week" in Irish (feminine noun). Pronounced /ˈʃaxt̪ˠənʲ/. Mutation forms: Séimhiú → sheachtain, Réamhlitir t → tseachtain.

Mutation forms

In Irish, the first letter of "seachtain" changes depending on the grammatical context. These are the mutated forms:

MutationForm
Base formseachtain
Séimhiúsheachtain
Réamhlitir ttseachtain

When does "seachtain" mutate?

ar feadh— for the duration of (compound preposition, triggers séimhiú on genitive noun)

seachtain→ar feadh seachtaine(for a week)

"seachtain" in context

Téim go dtí an phictiúrlann uair amháin sa seachtain.

I go to the cinema once a week.

B2

Chaith muid seachtain i nDún na nGall.

We spent a week in Donegal.

A2

Tá mé anseo le seachtain.

I've been here for a week.

A1

Bhí seachtain amháin deas te, ach bhí an dara seachtain beagáinín fuar.

One week was nice and warm, but the second week was a little cold.

A2

Bhí seachtain gheal againn.

We had a bright week.

A2

Further reading

Irish Mutations: Complete Guide to Séimhiú and Urú →Irish Pronunciation, The System Behind the Spelling →How to Learn Irish as an Adult, A Step-by-Step Roadmap →Best Irish Learning App 2026 →Browse all Irish vocabulary →

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Related Irish words

Dé Luain

Monday

Dé Máirt

Tuesday

Dé Céadaoin

Wednesday

Déardaoin

Thursday

Dé hAoine

Friday

Dé Sathairn

Saturday

Dé Domhnaigh

Sunday

uair

hour

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