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

‘cuas’ also means: cove · sinus

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

How to say “cavity” in Irish

Irish:
cuas
English:
cavity, cove, sinus
Word type:
noun
Gender:
masculine, first declension
Pronunciation:
“koo-us”  /kuəsˠ/
Various forms
Plural:
cuasa (cavities)
Genitive singular:
cuais, an chuais (e.g. béal an chuais, the mouth of the cavity)
Genitive plural:
cuas, na gcuas (e.g. ballaí na gcuas, the walls of the cavities)

What does “cuas” mean?

“Cuas” has three alternative meanings. The most common comes first.

cavity
A hollow space inside something, such as a hole in a tree, rock or the body.Also: hollow, recess, hole.
2 other meanings: cove or sinus
2cove
A small sheltered bay or inlet on the coast.Also: creek, inlet, small bay.
3sinus
An anatomical cavity, such as a sinus or the socket of a joint.Also: socket, body cavity.

“Cuas” with the article

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

an cuas
the cavity
No change after an
na cuasa
the cavities
Plural: no change after na

“Cuas” in a sentence: Irish examples

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

Tá cuas beag sa charraig sin.
There is a small hollow in that rock.
Chuamar ag snámh sa chuas ciúin.
We went swimming in the quiet cove.
Bhí an bád ceangailte i lár an chuais.
The boat was tied up in the middle of the cove.
Tá go leor cuasa ar an gcósta seo.
There are lots of coves on this coast.
Rinne an t-iora a nead i gcuas sa chrann.
The squirrel made its nest in a hollow in the tree.
Tá cuas i m'fhiacail agus tá sé tinn.
I have a cavity in my tooth and it hurts.
Bhí cuas mór san fhiacail aige.
He had a big cavity in his tooth.

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 cuas (pronounced “koo-us”). It’s a masculine noun and the plural is cuasa. Depending on context it can also mean cove or sinus.

How do you pronounce cuas in Irish?

Cuas is said like “koo-us” (IPA /kuəsˠ/).

What is the plural of cavity in Irish?

The plural of cuas is cuasa; with the article, na cuasa means “the cavities”. The genitive plural is cuas, as in ballaí na gcuas (the walls of the cavities).

Does cuas have more than one meaning?

Yes. Cuas can mean cavity, cove or sinus, depending on context; the first is the most common.

Why does cuas change to chuas or gcuas?

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

What is the difference between cuas and bá?

Cuas is a small cove or creek, while bá is a larger bay, as in Bá Bhaile Átha Cliath.

Can cuas be used for a tooth cavity?

Yes, cuas can mean any cavity, so cuas i bhfiacail is a cavity in a tooth, though poll is also common in speech.

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