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caith

must

VerbA1/kɑh/

"caith" means "must" in Irish (verb). Pronounced /kɑh/. Mutation forms: Séimhiú → chaith, Urú → gcaith.

Mutation forms

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

MutationForm
Base formcaith
Séimhiúchaith
Urúgcaith

"caith" in context

Caith an liathróid!

Throw the ball!

B1

Caith uait é.

Throw it away.

C1

Caith chugam an bríce.

Throw me that brick.

B2

Éirigh go gasta agus caith ort!

Get up quick and get dressed!

B1

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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