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Twentieth in Irish (Fichiú): Meaning, Pronunciation, Usage

The Irish for twentieth is fichiú, a masculine noun (plural fichithe).
Updated October 2026Report a mistake

How to say “twentieth” in Irish

Irish:
fichiú
English:
twentieth
Word type:
noun
Gender:
masculine
Pronunciation:
“FIH-hoo”  /ˈfʲɪhuː/
Various forms
Plural:
fichithe (twentieths)
Genitive singular:
fichiú, an fhichiú (e.g. luach an fhichiú, the value of the twentieth)
Genitive plural:
fichithe, na bhfichithe (e.g. suim na bhfichithe, the sum of the twentieths)

What does “fichiú” mean?

twentieth
The twentieth in a series, or a twentieth part of something; as a noun it means one of twenty equal parts.Also: twentieth part, one twentieth.

“Fichiú” with the article

The plural of twentieth in Irish is fichithe. Here is fichiú after the article (an t-alt), in the singular and the plural.

an fichiú
the twentieth
No change after an
na fichithe
the twentieths
Plural: no change after na

“Fichiú” in a sentence: Irish examples

Common Irish sentences using fichiú, the Irish word for twentieth.

Rugadh m'athair san fhichiú haois.
My father was born in the twentieth century.
Is é seo an fichiú lá den mhí.
This is the twentieth day of the month.
Fuair sé fichiú cuid den airgead.
He got a twentieth of the money.
Ba í an fichiú duine sa scuaine í.
She was the twentieth person in the queue.
Ceiliúrfaidh sí a fichiú breithlá Dé Sathairn.
She will celebrate her twentieth birthday on Saturday.
Tharla sé ag tús na fichiú haoise.
It happened at the start of the twentieth century.

Other nouns in Irish

More everyday Irish nouns to learn next.

Twentieth in Irish: frequently asked questions

What is the Irish for twentieth?

The Irish for twentieth is fichiú (pronounced “FIH-hoo”). It’s a masculine noun and the plural is fichithe.

How do you pronounce fichiú in Irish?

Fichiú is said like “FIH-hoo” (IPA /ˈfʲɪhuː/).

What is the plural of twentieth in Irish?

The plural of fichiú is fichithe; with the article, na fichithe means “the twentieths”. The genitive plural is fichithe, as in suim na bhfichithe (the sum of the twentieths).

Why does fichiú change to fhichiú or bhfichiú?

Irish changes the start of some words after certain words. After mo (my) fichiú becomes m'fhichiú (lenition), and after ár (our) or i (in) it becomes ár bhfichiú (eclipsis).

Why is it 'an fichiú haois' with h-?

Ordinal numbers like fichiú put h before a following vowel, so you say an fichiú haois, the twentieth century.

How is fichiú different from fiche?

Fiche is the cardinal number twenty, while fichiú is the ordinal, twentieth, or a twentieth part.

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