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Hollow in Irish (cuasach): Meaning, Forms, Examples

Other uses of ‘cuasach’: concave

The Irish for hollow is cuasach: crann cuasach, a hollow tree.
Updated October 2026Report a mistake

How to say “hollow” in Irish

Irish:
cuasach
English:
hollow, concave
Word type:
adjective
More hollow:
níos cuasaí
Most hollow:
is cuasaí
Plural:
cuasacha
Pronunciation:
“KOO-uh-sukh”  /ˈkuəsəx/

What does “cuasach” mean?

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

hollow
Having a hollow, cavity or empty space inside.Also: cavernous, cavity-filled.
1 other meaning: concave
2concave
Curved inwards like the inside of a bowl.Also: dished, sunken.

Other Irish adjectives for hollow: toll (hollow)

“Cuasach” after a noun

An Irish adjective comes after its noun. Here is cuasach after crann (tree, masculine), after carraig (rock, feminine) and after a plural.

after a masculine nouncrann cuasacha hollow tree
after a feminine nouncarraig chuasacha hollow rock
after a plural nouncrainn chuasachahollow trees

séimhiú (the h) the ending

feminine
carraigrock
+
cuasachhollow
=
carraig chuasacha hollow rock

After a feminine noun the adjective gets a séimhiú, an h after its first letter: carraig chuasach. After a masculine noun it stays as it is: crann cuasach.

plural
crainntrees
+
cuasachahollow, plural
=
crainn chuasachahollow trees

With a plural noun the adjective takes its plural form, cuasacha. It also gets an h after a plural that ends in a slender consonant: crainn chuasacha; after other plurals it does not: carraigeacha cuasacha.

More hollow, most hollow, very hollow

níosmore
+
cuasaíhollow
=
níos cuasaímore hollow
ismost
+
cuasaíhollow
=
is cuasaímost hollow

Tá an chloch seo níos cuasaí ná an ceann eile. This stone is more hollow than the other one.

more hollowníos cuasaíin the past tense: ní ba chuasaí
most hollowis cuasaíin the past tense: ba chuasaí
as hollow aschomh cuasach leno change after chomh
very hollowan-chuasachan- lenites, except d, t and s
too hollowróchuasachró- lenites

“Cuasach” in a sentence: Irish examples

With a masculine noun, a feminine noun, a plural, a comparison and on its own.

Bhí ioraí ina gcónaí sa chrann cuasach sin.
Squirrels lived in that hollow tree.
Tá carraig chuasach ar an trá.
There is a hollow rock on the beach.
Tá na crainn chuasacha sin an-sean.
Those hollow trees are very old.
Tá an chloch seo níos cuasaí ná an ceann eile.
This stone is more hollow than the other one.
Tá an lionsa seo cuasach.
This lens is concave.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Hollow in Irish: frequently asked questions

What is the Irish for hollow?

The Irish for hollow is cuasach (pronounced “KOO-uh-sukh”). It comes after the noun: crann cuasach, a hollow tree; carraig chuasach, a hollow rock.

How do you say more hollow and most hollow in Irish?

níos cuasaí is more hollow and is cuasaí is most hollow. In the past tense they become ní ba chuasaí and ba chuasaí.

Why does cuasach become chuasach?

After a feminine singular noun an adjective is lenited: it gets an h after its first letter. So carraig chuasach (a hollow rock) but crann cuasach (a hollow tree), because crann is masculine.

What is the plural of cuasach?

With a plural noun cuasach becomes cuasacha: crainn chuasacha, carraigeacha cuasacha. After a plural that ends in a slender consonant it is lenited as well.

How do you say very hollow in Irish?

an-chuasach. Too hollow is róchuasach, and as hollow as is chomh cuasach le.

Does cuasach have more than one meaning?

Yes. Cuasach can mean hollow or concave, depending on context; the first is the most common.

What is the opposite of 'cuasach' when talking about lenses?

The opposite of 'cuasach' (concave) is 'dronnach' (convex), as in 'lionsa dronnach'.

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