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Reason in Irish (Fáth): Meaning, Pronunciation, Usage

The Irish for reason is fáth, a masculine noun (plural fáthanna).
Updated October 2026Report a mistake

How to say “reason” in Irish

Irish:
fáth
English:
reason
Word type:
noun
Gender:
masculine, third declension
Pronunciation:
“faw”  /fˠɑːh/
Various forms
Plural:
fáthanna (reasons)
Genitive singular:
fátha, an fhátha (e.g. míniú an fhátha, explanation of the reason)
Genitive plural:
fáthanna, na bhfáthanna (e.g. liosta na bhfáthanna, the list of reasons)

What does “fáth” mean?

reason
The reason or cause why something happens or is done.Also: cause, grounds, why, motive.

Other Irish words for reason: réasún (reason)

“Fáth” with the article

The plural of reason in Irish is fáthanna. Here is fáth after the article (an t-alt), in the singular and the plural.

an fáth
the reason
No change after an
na fáthanna
the reasons
Plural: no change after na

“Fáth” in a sentence: Irish examples

Common Irish sentences using fáth, the Irish word for reason.

Cén fáth a bhfuil tú déanach?
Why are you late?
Níl a fhios agam cén fáth.
I don't know why.
Bhí fáth maith aige leis sin.
He had a good reason for that.
Sin é an fáth ar fhág sí.
That's the reason she left.
Tá go leor fáthanna leis an athrú.
There are plenty of reasons for the change.
Ní raibh aon fháth le himní.
There was no reason to worry.
D'inis sé dom an fáth a raibh sé brónach.
He told me why he was sad.

Other nouns in Irish

More everyday Irish nouns to learn next.

Phrases with “fáth”

Reason in Irish: frequently asked questions

What is the Irish for reason?

The Irish for reason is fáth (pronounced “faw”). It’s a masculine noun and the plural is fáthanna.

How do you pronounce fáth in Irish?

Fáth is said like “faw” (IPA /fˠɑːh/).

What is the plural of reason in Irish?

The plural of fáth is fáthanna; with the article, na fáthanna means “the reasons”. The genitive plural is fáthanna, as in liosta na bhfáthanna (the list of reasons).

Why does fáth change to fháth or bhfáth?

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

How do I say 'why' in Irish?

Use 'cén fáth', literally 'what reason', followed by a relative clause: 'Cén fáth a bhfuil tú anseo?' means 'Why are you here?'

What is the difference between 'fáth' and 'cúis'?

Both can mean reason, but 'cúis' also means a cause or a legal case, while 'fáth' is the usual word in 'cén fáth' for asking why.

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