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cathain

when

AdverbA1

"cathain" means "when" in Irish (adverb). Mutation forms: Séimhiú → chathain, Urú → gcathain.

Mutation forms

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

MutationForm
Base formcathain
Séimhiúchathain
Urúgcathain

"cathain" in context

Cathain a bhí sé anseo cheana?

When is the last time he was here?

A1

Cathain a rachaidh Sita go dtí Eluru?

When will Sita go to Eluru?

A2

Cathain a chan mo dheirfiúr an t-amhrán sin?

When did my sister sing that song?

B2

Cathain a bheidh siad ag teacht ar ais ón saoire?

When are they coming back from vacation?

A2

Cathain a bheidh tú ag dul siar go Gaillimh?

When will you be going back to Galway?

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

ansin

there/then

anois

now

inniu

today

inné

yesterday

amárach

tomorrow

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