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Rapid in Irish (Fánsruth): Meaning, Pronunciation, Usage

The Irish for rapid is fánsruth, a masculine noun (plural fánsruthanna).
Updated October 2026Report a mistake

How to say “rapid” in Irish

Irish:
fánsruth
English:
rapid
Word type:
noun
Gender:
masculine, third declension
Pronunciation:
“FAWN-sruh”  /ˈfɑːnˌsˠɾˠʊ/
Various forms
Plural:
fánsruthanna (rapids)
Genitive singular:
fánsrutha, an fhánsrutha (e.g. fuaim an fhánsrutha, the sound of the rapid)
Genitive plural:
fánsruthanna, na bhfánsruthanna (e.g. ceantar na bhfánsruthanna, the area of the rapids)

What does “fánsruth” mean?

rapid
A stretch of a river where the water flows fast down a slope, usually over rocks.Also: rapids, downward current, fast current.

“Fánsruth” with the article

The plural of rapid in Irish is fánsruthanna. Here is fánsruth after the article (an t-alt), in the singular and the plural.

an fánsruth
the rapid
No change after an
na fánsruthanna
the rapids
Plural: no change after na

“Fánsruth” in a sentence: Irish examples

Common Irish sentences using fánsruth, the Irish word for rapid.

Tá fánsruth contúirteach san abhainn seo.
There is a dangerous rapid in this river.
Chuaigh an curach síos an fánsruth go tapa.
The canoe went quickly down the rapid.
Chualamar torann an fhánsrutha i bhfad uainn.
We heard the roar of the rapid far away.
Tá go leor fánsruthanna ar an abhainn sin.
There are lots of rapids on that river.
Bhí an t-uisce an-gharbh san fhánsruth.
The water was very rough in the rapid.
Thit sé isteach i bhfánsruth agus é ag iascach.
He fell into a rapid while fishing.
Seachain na fánsruthanna nuair a bhíonn an abhainn ard.
Avoid the rapids when the river is high.

Other nouns in Irish

More everyday Irish nouns to learn next.

Rapid in Irish: frequently asked questions

What is the Irish for rapid?

The Irish for rapid is fánsruth (pronounced “FAWN-sruh”). It’s a masculine noun and the plural is fánsruthanna.

How do you pronounce fánsruth in Irish?

Fánsruth is said like “FAWN-sruh” (IPA /ˈfɑːnˌsˠɾˠʊ/).

What is the plural of rapid in Irish?

The plural of fánsruth is fánsruthanna; with the article, na fánsruthanna means “the rapids”. The genitive plural is fánsruthanna, as in ceantar na bhfánsruthanna (the area of the rapids).

Why does fánsruth change to fhánsruth or bhfánsruth?

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

How is 'fánsruth' different from 'eas'?

'Fánsruth' is a fast, sloping stretch of river (a rapid), while 'eas' is a waterfall where the water drops vertically.

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