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Cavity in Irish (Cuasán): Meaning, Pronunciation, Usage

‘cuasán’ also means: chamber

The Irish for cavity is cuasán, a masculine noun (plural cuasáin).
Updated October 2026Report a mistake

How to say “cavity” in Irish

Irish:
cuasán
English:
cavity, chamber
Word type:
noun
Gender:
masculine
Pronunciation:
“KOO-uh-sawn”  /ˈkuəsˠaːnˠ/
Various forms
Plural:
cuasáin (cavities)
Genitive singular:
cuasáin, an chuasáin (e.g. balla an chuasáin, the wall of the cavity)
Genitive plural:
cuasán, na gcuasán (e.g. líon na gcuasán, the number of cavities)

What does “cuasán” mean?

“Cuasán” has two alternative meanings. The most common comes first.

cavity
A small hollow space inside something solid, such as in a tooth, rock or the body.Also: small hollow, hollow, recess.
1 other meaning: chamber
2chamber
The part of a gun that holds the cartridge before it is fired.Also: gun chamber, breech chamber.

Other Irish words for cavity: cuas (cavity)

“Cuasán” with the article

The plural of cavity in Irish is cuasáin. Here is cuasán after the article (an t-alt), in the singular and the plural.

an cuasán
the cavity
No change after an
na cuasáin
the cavities
Plural: no change after na

“Cuasán” in a sentence: Irish examples

Common Irish sentences using cuasán, the Irish word for cavity.

Tá cuasán i m'fhiacail.
I have a cavity in my tooth.
Líon an fiaclóir an cuasán inné.
The dentist filled the cavity yesterday.
Bhí uisce i mbun an chuasáin.
There was water at the bottom of the hollow.
Tá cuasáin bheaga sa charraig seo.
There are small hollows in this rock.
Chuir sé an t-urchar sa chuasán.
He put the round in the chamber.
Is cuasán é an béal sa chorp.
The mouth is a cavity in the body.
Fuair an fiaclóir dhá chuasán i mo chuid fiacla.
The dentist found two cavities in my teeth.

Other nouns in Irish

More everyday Irish nouns to learn next.

Cavity in Irish: frequently asked questions

What is the Irish for cavity?

The Irish for cavity is cuasán (pronounced “KOO-uh-sawn”). It’s a masculine noun and the plural is cuasáin. Depending on context it can also mean chamber.

How do you pronounce cuasán in Irish?

Cuasán is said like “KOO-uh-sawn” (IPA /ˈkuəsˠaːnˠ/).

What is the plural of cavity in Irish?

The plural of cuasán is cuasáin; with the article, na cuasáin means “the cavities”. The genitive plural is cuasán, as in líon na gcuasán (the number of cavities).

Does cuasán have more than one meaning?

Yes. Cuasán can mean cavity or chamber, depending on context; the first is the most common.

Why does cuasán change to chuasán or gcuasán?

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

How is 'cuasán' related to 'cuas'?

'Cuasán' is a diminutive of 'cuas' (cavity, cove), so it suggests a small hollow or cavity.

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