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Harmful in Irish (díobhálach): Meaning, Forms, Examples

The Irish for harmful is díobhálach: fear díobhálach, a harmful man.
Updated October 2026Report a mistake

How to say “harmful” in Irish

Irish:
díobhálach
English:
harmful
Word type:
adjective
More harmful:
níos díobhálaí
Most harmful:
is díobhálaí
Plural:
díobhálacha
Pronunciation:
“DEE-vaw-lukh”  /ˈdʲiːwɑːl̪ˠəx/

What does “díobhálach” mean?

harmful
Causing harm, damage or injury.Also: injurious, damaging, detrimental, hurtful.

Other Irish adjectives for harmful: urchóideach (harmful), dochrach (harmful)

“Díobhálach” after a noun

An Irish adjective comes after its noun. Here is díobhálach after fear (man, masculine), after scéim (scheme, feminine) and after a plural.

after a masculine nounfear díobhálacha harmful man
after a feminine nounscéim dhíobhálacha harmful scheme
after a plural nounfir dhíobhálachaharmful men

séimhiú (the h) the ending

feminine
scéimscheme
+
díobhálachharmful
=
scéim dhíobhálacha harmful scheme

After a feminine noun the adjective gets a séimhiú, an h after its first letter: scéim dhíobhálach. After a masculine noun it stays as it is: fear díobhálach.

plural
firmen
+
díobhálachaharmful, plural
=
fir dhíobhálachaharmful men

With a plural noun the adjective takes its plural form, díobhálacha. It also gets an h after a plural that ends in a slender consonant: fir dhíobhálacha; after other plurals it does not: scéimeanna díobhálacha.

More harmful, most harmful, very harmful

níosmore
+
díobhálaíharmful
=
níos díobhálaímore harmful
ismost
+
díobhálaíharmful
=
is díobhálaímost harmful

Tá an t-ól níos díobhálaí ná mar a cheapann daoine. Drink is more harmful than people think.

more harmfulníos díobhálaíin the past tense: ní ba dhíobhálaí
most harmfulis díobhálaíin the past tense: ba dhíobhálaí
as harmful aschomh díobhálach leno change after chomh
very harmfulan-díobhálachan- lenites, except d, t and s
too harmfulródhíobhálachró- lenites

“Díobhálach” in a sentence: Irish examples

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

Is nós díobhálach é an tobac a chaitheamh.
Smoking tobacco is a harmful habit.
Tá seacláid díobhálach do mhadraí.
Chocolate is harmful to dogs.
Seachain na ceimiceáin díobhálacha sin.
Avoid those harmful chemicals.
Tá an t-ól níos díobhálaí ná mar a cheapann daoine.
Drink is more harmful than people think.
Tá an ghrian díobhálach don chraiceann.
The sun is harmful to the skin.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Harmful in Irish: frequently asked questions

What is the Irish for harmful?

The Irish for harmful is díobhálach (pronounced “DEE-vaw-lukh”). It comes after the noun: fear díobhálach, a harmful man; scéim dhíobhálach, a harmful scheme.

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

níos díobhálaí is more harmful and is díobhálaí is most harmful. In the past tense they become ní ba dhíobhálaí and ba dhíobhálaí.

Why does díobhálach become dhíobhálach?

After a feminine singular noun an adjective is lenited: it gets an h after its first letter. So scéim dhíobhálach (a harmful scheme) but fear díobhálach (a harmful man), because fear is masculine.

What is the plural of díobhálach?

With a plural noun díobhálach becomes díobhálacha: fir dhíobhálacha, scéimeanna díobhálacha. After a plural that ends in a slender consonant it is lenited as well.

How do you say very harmful in Irish?

an-díobhálach. Too harmful is ródhíobhálach, and as harmful as is chomh díobhálach le.

Which preposition follows díobhálach?

Use do: díobhálach don tsláinte means harmful to health.

What is the difference between díobhálach and dochrach?

Both mean harmful and are largely interchangeable; dochrach is very common in official and health texts, as in substaintí dochracha.

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