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Roundworm in Irish (Cruinnphéist): Meaning, Pronunciation, Usage

The Irish for roundworm is cruinnphéist, a feminine noun (plural cruinnphéisteanna).
Updated October 2026Report a mistake

How to say “roundworm” in Irish

Irish:
cruinnphéist
English:
roundworm
Word type:
noun
Gender:
feminine, second declension
Pronunciation:
“KRIN-faysht”  /ˈkɾˠɪnʲˌfʲeːʃtʲ/
Various forms
Plural:
cruinnphéisteanna (roundworms)
Genitive singular:
cruinnphéiste, na cruinnphéiste (e.g. ubh na cruinnphéiste, the egg of the roundworm)
Genitive plural:
cruinnphéisteanna, na gcruinnphéisteanna (e.g. saolré na gcruinnphéisteanna, the life cycle of roundworms)

What does “cruinnphéist” mean?

roundworm
A worm with a long, round, unsegmented body, many kinds of which live as parasites in people and animals.Also: nematode, threadworm, parasitic worm.

“Cruinnphéist” with the article

The plural of roundworm in Irish is cruinnphéisteanna. Here is cruinnphéist after the article (an t-alt), in the singular and the plural.

an chruinnphéist
the roundworm
Lenition: c becomes ch after an (feminine noun)
na cruinnphéisteanna
the roundworms
Plural: no change after na

“Cruinnphéist” in a sentence: Irish examples

Common Irish sentences using cruinnphéist, the Irish word for roundworm.

Is cineál péiste í an chruinnphéist.
The roundworm is a kind of worm.
Bhí cruinnphéist sa mhadra.
The dog had a roundworm.
Tá cruinnphéisteanna coitianta i muca.
Roundworms are common in pigs.
Thug an tréidlia leigheas dúinn in aghaidh cruinnphéisteanna.
The vet gave us a treatment for roundworms.
Fuarthas uibheacha na cruinnphéiste san ithir.
The roundworm's eggs were found in the soil.
Bhí cruinnphéisteanna i mo chat nua.
My new cat had roundworms.
Chonaiceamar cruinnphéist faoin micreascóp inniu.
We saw a roundworm under the microscope today.

Other nouns in Irish

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Roundworm in Irish: frequently asked questions

What is the Irish for roundworm?

The Irish for roundworm is cruinnphéist (pronounced “KRIN-faysht”). It’s a feminine noun and the plural is cruinnphéisteanna.

How do you pronounce cruinnphéist in Irish?

Cruinnphéist is said like “KRIN-faysht” (IPA /ˈkɾˠɪnʲˌfʲeːʃtʲ/).

What is the plural of roundworm in Irish?

The plural of cruinnphéist is cruinnphéisteanna; with the article, na cruinnphéisteanna means “the roundworms”. The genitive plural is cruinnphéisteanna, as in saolré na gcruinnphéisteanna (the life cycle of roundworms).

Why does cruinnphéist change to chruinnphéist or gcruinnphéist?

Irish changes the start of some words after certain words. After mo (my) cruinnphéist becomes mo chruinnphéist (lenition), and after ár (our) or i (in) it becomes ár gcruinnphéist (eclipsis).

How is 'cruinnphéist' different from 'péist'?

'Péist' is the general word for a worm, while 'cruinnphéist' (from 'cruinn', round, and 'péist') names the roundworm or nematode specifically.

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