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Seventh in Irish (Seachtú): Meaning, Pronunciation, Usage

‘seachtú’ also means: seventh (music)

The Irish for seventh is seachtú, a masculine noun (plural seachtuithe).
Updated October 2026Report a mistake

How to say “seventh” in Irish

Irish:
seachtú
English:
seventh, seventh (music)
Word type:
noun
Gender:
masculine
Pronunciation:
“SHAKH-too”  /ˈʃaxt̪ˠuː/
Various forms
Plural:
seachtuithe (sevenths)
Genitive singular:
seachtú, an tseachtú (e.g. leath an tseachtú, half of the seventh)
Genitive plural:
seachtuithe, na seachtuithe (e.g. suim na seachtuithe, the sum of the sevenths)

What does “seachtú” mean?

“Seachtú” has two alternative meanings. The most common comes first.

seventh
One of seven equal parts of something; also the seventh one in a series.Also: one seventh, seventh part.
1 other meaning: seventh (music)
2seventh (music)
In music, the interval of seven notes on the scale.Also: seventh, musical seventh, interval.

“Seachtú” with the article

The plural of seventh in Irish is seachtuithe. Here is seachtú after the article (an t-alt), in the singular and the plural.

an seachtú
the seventh
No change after an
na seachtuithe
the sevenths
Plural: no change after na

“Seachtú” in a sentence: Irish examples

Common Irish sentences using seachtú, the Irish word for seventh.

Fuair sé an seachtú cuid den airgead.
He got a seventh of the money.
Bhí sí sa seachtú háit sa rás.
She was in seventh place in the race.
Cuir dhá sheachtú le chéile.
Add two sevenths together.
Tá trí sheachtú fágtha againn.
We have three sevenths left.
Sin an seachtú haithne, a pháistí.
That is the seventh commandment, children.

Other nouns in Irish

More everyday Irish nouns to learn next.

Seventh in Irish: frequently asked questions

What is the Irish for seventh?

The Irish for seventh is seachtú (pronounced “SHAKH-too”). It’s a masculine noun and the plural is seachtuithe. Depending on context it can also mean seventh (music).

How do you pronounce seachtú in Irish?

Seachtú is said like “SHAKH-too” (IPA /ˈʃaxt̪ˠuː/).

What is the plural of seventh in Irish?

The plural of seachtú is seachtuithe; with the article, na seachtuithe means “the sevenths”. The genitive plural is seachtuithe, as in suim na seachtuithe (the sum of the sevenths).

Does seachtú have more than one meaning?

Yes. Seachtú can mean seventh or seventh (music), depending on context; the first is the most common.

Why does seachtú change to sheachtú?

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

How is 'seachtú' used as an ordinal before a noun?

As an ordinal it comes before the noun and prefixes h to a vowel, as in 'an seachtú haithne' (the seventh commandment) and 'an seachtú lá' (the seventh day).

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