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

Other uses of ‘urchóideach’: malignant · malicious

The Irish for harmful is urchóideach: meall urchóideach, a harmful lump.
Updated October 2026Report a mistake

How to say “harmful” in Irish

Irish:
urchóideach
English:
harmful, malignant, malicious
Word type:
adjective
More harmful:
níos urchóidí
Most harmful:
is urchóidí
Plural:
urchóideacha
Pronunciation:
“ur-HOE-jukh”  /ɾˠəˈxoːdʲəx/

What does “urchóideach” mean?

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

harmful
Causing harm or damage.Also: injurious, damaging, hurtful.
2 other meanings: malignant or malicious
2malignant
Of a disease or tumour: dangerous and likely to spread.Also: cancerous.
3malicious
Intending to do harm to others; spiteful.Also: mischievous, spiteful, malevolent.

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

“Urchóideach” after a noun

An Irish adjective comes after its noun. Here is urchóideach after meall (lump, masculine), after bean (woman, feminine) and after a plural.

after a masculine nounmeall urchóideacha harmful lump
after a feminine nounbean urchóideacha harmful woman
after a plural nounmeallta urchóideachaharmful lumps

séimhiú (the h) the ending

plural
mealltalumps
+
urchóideachaharmful, plural
=
meallta urchóideachaharmful lumps

With a plural noun the adjective takes its plural form, urchóideacha.

More harmful, most harmful, very harmful

níosmore
+
urchóidíharmful
=
níos urchóidímore harmful
ismost
+
urchóidíharmful
=
is urchóidímost harmful

Tá an deatach seo níos urchóidí ná an ceann eile. This smoke is more harmful than the other one.

more harmfulníos urchóidíin the past tense: ní b'urchóidí
most harmfulis urchóidíin the past tense: ab urchóidí
as harmful aschomh hurchóideach lechomh puts an h before a vowel
very harmfulan-urchóideachan- lenites, except d, t and s
too harmfulró-urchóideachró- lenites

“Urchóideach” in a sentence: Irish examples

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

Fuarthas meall urchóideach ina scamhóg.
A malignant tumour was found in his lung.
Is galar urchóideach í an ailse.
Cancer is a malignant disease.
Tá ceimiceáin urchóideacha san uisce.
There are harmful chemicals in the water.
Tá an deatach seo níos urchóidí ná an ceann eile.
This smoke is more harmful than the other one.
Tá an tobac urchóideach don tsláinte.
Tobacco is harmful to health.

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 urchóideach (pronounced “ur-HOE-jukh”). It comes after the noun: meall urchóideach, a harmful lump; bean urchóideach, a harmful woman.

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

níos urchóidí is more harmful and is urchóidí is most harmful. In the past tense they become ní b'urchóidí and ab urchóidí.

What is the plural of urchóideach?

With a plural noun urchóideach becomes urchóideacha: meallta urchóideacha, mná urchóideacha.

How do you say very harmful in Irish?

an-urchóideach. Too harmful is ró-urchóideach, and as harmful as is chomh hurchóideach le.

Does urchóideach have more than one meaning?

Yes. Urchóideach can mean harmful, malignant or malicious, depending on context; the first is the most common.

What is the opposite of urchóideach?

The opposite is neamhurchóideach, meaning harmless or benign, as in meall neamhurchóideach, a benign tumour.

Which preposition follows urchóideach?

Use do: Tá sé urchóideach don tsláinte, it is harmful to health.

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