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Deep in Irish (domhain): Meaning, Forms, Examples

Other uses of ‘domhain’: profound

The Irish for deep is domhain: poll domhain, a deep hole.
Updated October 2026Report a mistake

How to say “deep” in Irish

Irish:
domhain
English:
deep, profound
Word type:
adjective
Deeper:
níos doimhne
Deepest:
is doimhne
Plural:
doimhne
Pronunciation:
“dowin”  /d̪ˠaunʲ/

What does “domhain” mean?

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

deep
Going a long way down from the top or surface, or far in from the front.Also: bottomless, low.
1 other meaning: profound
2profound
Serious, intense or hard to understand, used of thoughts, feelings or sleep.Also: deep, intense, heavy.

“Domhain” after a noun

An Irish adjective comes after its noun. Here is domhain after poll (hole, masculine), after farraige (sea, feminine) and after a plural.

after a masculine nounpoll domhaina deep hole
after a feminine nounfarraige dhomhaina deep sea
after a plural nounpoill dhoimhnedeep holes

séimhiú (the h) the ending

feminine
farraigesea
+
domhaindeep
=
farraige dhomhaina deep sea

After a feminine noun the adjective gets a séimhiú, an h after its first letter: farraige dhomhain. After a masculine noun it stays as it is: poll domhain.

plural
poillholes
+
doimhnedeep, plural
=
poill dhoimhnedeep holes

With a plural noun the adjective takes its plural form, doimhne. It also gets an h after a plural that ends in a slender consonant: poill dhoimhne; after other plurals it does not: farraigí doimhne.

Deeper, deepest, very deep

níosmore
+
doimhnedeep
=
níos doimhnedeeper
ismost
+
doimhnedeep
=
is doimhnedeepest

Tá an abhainn seo níos doimhne ná an ceann eile. This river is deeper than the other one.

deeperníos doimhnein the past tense: ní ba dhoimhne
deepestis doimhnein the past tense: ba dhoimhne
as deep aschomh domhain leno change after chomh
very deepan-domhainan- lenites, except d, t and s
too deepródhomhainró- lenites

“Domhain” in a sentence: Irish examples

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

Tá poll domhain sa ghairdín.
There is a deep hole in the garden.
Tharraing sí anáil dhomhain.
She took a deep breath.
Tá locha doimhne sna sléibhte.
There are deep lakes in the mountains.
Tá an abhainn seo níos doimhne ná an ceann eile.
This river is deeper than the other one.
Tá an t-uisce domhain anseo.
The water is deep here.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Deep in Irish: frequently asked questions

What is the Irish for deep?

The Irish for deep is domhain (pronounced “dowin”). It comes after the noun: poll domhain, a deep hole; farraige dhomhain, a deep sea.

How do you say deeper and deepest in Irish?

níos doimhne is deeper and is doimhne is deepest. In the past tense they become ní ba dhoimhne and ba dhoimhne.

Why does domhain become dhomhain?

After a feminine singular noun an adjective is lenited: it gets an h after its first letter. So farraige dhomhain (a deep sea) but poll domhain (a deep hole), because poll is masculine.

What is the plural of domhain?

With a plural noun domhain becomes doimhne: poill dhoimhne, farraigí doimhne. After a plural that ends in a slender consonant it is lenited as well.

How do you say very deep in Irish?

an-domhain. Too deep is ródhomhain, and as deep as is chomh domhain le.

Does domhain have more than one meaning?

Yes. Domhain can mean deep or profound, depending on context; the first is the most common.

What is the opposite of domhain?

For water, the opposite is usually 'tanaí' (shallow), and 'éadomhain' also means shallow.

Is domhain the same as the noun 'domhan'?

No. 'Domhan' means world; 'domhain' as an adjective means deep, though 'domhain' is also the genitive of 'domhan', as in 'ar fud an domhain'.

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