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ceo

fog

NounMasculineB2/coː/

"ceo" means "fog" in Irish (masculine noun). Pronounced /coː/. Mutation forms: Séimhiú → cheo, Urú → gceo.

Mutation forms

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

MutationForm
Base formceo
Séimhiúcheo
Urúgceo

"ceo" in context

Bhí dreach dorcha uaigneach ar na cnoic agus scamall ceo ina luí ar bharr an tsléibhe.

The hills looked dark and lonely with a cloud of fog lying on the top of the mountain.

B2

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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