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a ceathair

four (4)

numeralA1

"a ceathair" means "four (4)" in Irish (numeral). Mutation forms: Urú → n-a ceathair, Réamhlitir h → ha ceathair, Réamhlitir t → t-a ceathair.

Mutation forms

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

MutationForm
Base forma ceathair
Urún-a ceathair
Réamhlitir hha ceathair
Réamhlitir tt-a ceathair

"a ceathair" in context

Tá sé a ceathair a chlog.

It's four o'clock.

A2

A haon, a dó, a trí, a ceathair, a cúig, a sé, a seacht, a hocht, a naoi, a deich.

One, two, three, four, five, six, seven, eight, nine, ten.

B2

Bíonn mo chuid ranganna ar siúl ag a ceathair a chlog chuile thráthnóna.

My classes are [usually] at four o'clock each afternoon.

B1

Imeoidh sé ag a dó a chlog sa tráthnóna agus beidh sé i Nua-Eabhrac thart ar cheathrú tar éis a ceathair, am Nua-Eabhrac, ar ndóigh.

It leaves at two o'clock in the afternoon and it will be in New York about a quarter past four, New York time, of course.

B2

ACHT CHUN SUIMEANNA ÁIRITHE AS AN bPRÍMH-CHISTE DO CHUR CHUN SEIRBHÍSE NA mBLIAN DAR CRÍCHEANNA AN t-AONÚ LÁ DÉAG AR FHICHID DE MHÁRTA, MÍLE, NAOI gCÉAD, A TRÍ FICHEAD AGUS MÍLE, NAOI gCÉAD, A CEATHAIR FICHEAD.

AN ACT TO APPLY CERTAIN SUMS OUT OF THE CENTRAL FUND TO THE SERVICE OF THE YEARS ENDING ON THE THIRTY-FIRST DAY OF MARCH, ONE THOUSAND NINE HUNDRED AND TWENTY-THREE, AND ONE THOUSAND NINE HUNDRED AND TWENTY-FOUR.

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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Related Irish words

a haon

one (1)

a dó

two (2)

a trí

three (3)

a cúig

five (5)

a sé

six (6)

a seacht

seven (7)

a hocht

eight (8)

a naoi

nine (9)

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