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Forty in Irish (Ceathracha): Meaning, Pronunciation, Usage

The Irish for forty is ceathracha, a masculine noun (plural ceathrachaidí).
Updated October 2026Report a mistake

How to say “forty” in Irish

Irish:
ceathracha
English:
forty
Word type:
noun
Gender:
masculine
Pronunciation:
“KYAR-ukh-uh”  /ˈcaɾˠəxə/
Various forms
Plural:
ceathrachaidí (forties)
Genitive singular:
ceathrachad, an cheathrachad (e.g. fear ceathrachad bliain, a man of forty years)
Genitive plural:
ceathrachaidí, na gceathrachaidí (e.g. ceol na gceathrachaidí, the music of the forties)

What does “ceathracha” mean?

forty
The number forty, used in the decimal counting system, mainly in counting and before nouns.Also: number forty, 40.

Other Irish words for forty: daichead (forty)

“Ceathracha” with the article

The plural of forty in Irish is ceathrachaidí. Here is ceathracha after the article (an t-alt), in the singular and the plural.

an ceathracha
the forty
No change after an
na ceathrachaidí
the forties
Plural: no change after na

“Ceathracha” in a sentence: Irish examples

Common Irish sentences using ceathracha, the Irish word for forty.

Tá cúig euro agus ceathracha ceint air.
It's five euros and forty cents.
Tá ceathracha duine sa rang.
There are forty people in the class.
Bhí mé ag fanacht ceathracha nóiméad.
I was waiting forty minutes.
Tá m'athair ceathracha bliain d'aois.
My father is forty years old.
Scríobh an uimhir ceathracha ar an gclár.
Write the number forty on the board.
Tá ceathracha teach ar an tsráid seo.
There are forty houses on this street.
Cuir deich le tríocha agus gheobhaidh tú ceathracha.
Add ten to thirty and you'll get forty.

Other nouns in Irish

More everyday Irish nouns to learn next.

Forty in Irish: frequently asked questions

What is the Irish for forty?

The Irish for forty is ceathracha (pronounced “KYAR-ukh-uh”). It’s a masculine noun and the plural is ceathrachaidí.

How do you pronounce ceathracha in Irish?

Ceathracha is said like “KYAR-ukh-uh” (IPA /ˈcaɾˠəxə/).

What is the plural of forty in Irish?

The plural of ceathracha is ceathrachaidí; with the article, na ceathrachaidí means “the forties”. The genitive plural is ceathrachaidí, as in ceol na gceathrachaidí (the music of the forties).

Why does ceathracha change to cheathracha or gceathracha?

Irish changes the start of some words after certain words. After mo (my) ceathracha becomes mo cheathracha (lenition), and after ár (our) or i (in) it becomes ár gceathracha (eclipsis).

What is the difference between 'ceathracha' and 'daichead'?

'Ceathracha' is the decimal form of forty, often used in schools and with money, while 'daichead' is the traditional form used in everyday speech.

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