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Sixth in Irish (Séú): Meaning, Pronunciation, Usage

The Irish for sixth is séú, a masculine noun (plural séithe).
Updated October 2026Report a mistake

How to say “sixth” in Irish

Irish:
séú
English:
sixth
Word type:
noun
Gender:
masculine
Pronunciation:
“SHAY-oo”  /ˈʃeːuː/
Various forms
Plural:
séithe (sixths)
Genitive singular:
séú, an tséú (e.g. luach an tséú, the value of the sixth)
Genitive plural:
séithe, na séithe (e.g. suim na séithe, the sum of the sixths)

What does “séú” mean?

sixth
One of six equal parts of something, or the one in sixth place in a series.Also: one sixth, sixth part.

“Séú” with the article

The plural of sixth in Irish is séithe. Here is séú after the article (an t-alt), in the singular and the plural.

an séú
the sixth
No change after an
na séithe
the sixths
Plural: no change after na

“Séú” in a sentence: Irish examples

Common Irish sentences using séú, the Irish word for sixth.

Fuair gach duine séú den cháca.
Everyone got a sixth of the cake.
Is ionann dhá shéú agus trian.
Two sixths equal a third.
Tá séú den airgead fágtha agam.
I have a sixth of the money left.
Tá séú den rang as láthair inniu.
A sixth of the class is absent today.
Chaith sé séú dá thuarastal ar chíos.
He spent a sixth of his salary on rent.

Other nouns in Irish

More everyday Irish nouns to learn next.

Sixth in Irish: frequently asked questions

What is the Irish for sixth?

The Irish for sixth is séú (pronounced “SHAY-oo”). It’s a masculine noun and the plural is séithe.

How do you pronounce séú in Irish?

Séú is said like “SHAY-oo” (IPA /ˈʃeːuː/).

What is the plural of sixth in Irish?

The plural of séú is séithe; with the article, na séithe means “the sixths”. The genitive plural is séithe, as in suim na séithe (the sum of the sixths).

Why does séú change to shéú?

After words like mo (my) and do (your) the first letter is lenited: mo shéú. After ár (our) it stays ár séú, because s does not take eclipsis.

Is 'séú' a noun or an adjective?

Both: as an ordinal it means sixth, as in 'an séú lá' (the sixth day), and as a noun it means a sixth part, as in 'séú den cháca'.

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