HeyRua Get the app

Eighth in Irish (Ochtú): Meaning, Pronunciation, Usage

The Irish for eighth is ochtú, a masculine noun (plural ochtuithe).
Updated October 2026Report a mistake

How to say “eighth” in Irish

Irish:
ochtú
English:
eighth
Word type:
noun
Gender:
masculine
Pronunciation:
“OKH-too”  /ˈɔxt̪ˠuː/
Various forms
Plural:
ochtuithe (eighths)
Genitive singular:
ochtú, an ochtú (e.g. luach an ochtú, the value of the eighth)
Genitive plural:
ochtuithe, na n-ochtuithe (e.g. suim na n-ochtuithe, the sum of the eighths)

What does “ochtú” mean?

eighth
One of eight equal parts of something; an eighth part.Also: eighth part, one eighth, fraction.

“Ochtú” with the article

The plural of eighth in Irish is ochtuithe. Here is ochtú after the article (an t-alt), in the singular and the plural.

an t-ochtú
the eighth
Masculine nouns take t before a vowel after an
na hochtuithe
the eighths
Plural: na adds h before a vowel

“Ochtú” in a sentence: Irish examples

Common Irish sentences using ochtú, the Irish word for eighth.

Is ionann ochtú agus leath de cheathrú.
An eighth is the same as half a quarter.
Fuair gach duine ochtú den chíste.
Everyone got an eighth of the cake.
Tá trí ochtú níos lú ná leath.
Three eighths is less than a half.
Scríobh an t-ochtú mar dheachúil.
Write the eighth as a decimal.
Cuir na hochtuithe seo le chéile.
Add these eighths together.
Ní raibh ach ochtú den talamh curtha.
Only an eighth of the land was sown.
Roinn an phióg ina n-ochtuithe.
Divide the pie into eighths.

Other nouns in Irish

More everyday Irish nouns to learn next.

Eighth in Irish: frequently asked questions

What is the Irish for eighth?

The Irish for eighth is ochtú (pronounced “OKH-too”). It’s a masculine noun and the plural is ochtuithe.

How do you pronounce ochtú in Irish?

Ochtú is said like “OKH-too” (IPA /ˈɔxt̪ˠuː/).

What is the plural of eighth in Irish?

The plural of ochtú is ochtuithe; with the article, na hochtuithe means “the eighths”. The genitive plural is ochtuithe, as in suim na n-ochtuithe (the sum of the eighths).

Why does ochtú sometimes have a t or h in front of it?

Irish nouns beginning with a vowel take a prefix after certain words: an t-ochtú (the eighth), a hochtú (her eighth), a n-ochtú (their eighth), na hochtuithe (the eighths).

What is the difference between the noun ochtú and the ordinal an t-ochtú?

The ordinal an t-ochtú means 'the eighth' in a series, as in an t-ochtú lá, while the noun ochtú means an eighth part, as in ochtú den airgead.

Learn Irish by
actually speaking it

Learn everyday Irish words like ochtú through guided conversation with Rua.

7-day free trial. Cancel anytime.

The HeyRua app home screen