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Illegal in Irish (aindleathach): Meaning, Forms, Examples

The Irish for illegal is aindleathach: gnó aindleathach, an illegal business.
Updated October 2026Report a mistake

How to say “illegal” in Irish

Irish:
aindleathach
English:
illegal
Word type:
adjective
More illegal:
níos aindleathaí
Most illegal:
is aindleathaí
Plural:
aindleathacha
Pronunciation:
“AN-yeh-lah-hukh”  /ˈanʲˌlʲahəx/

What does “aindleathach” mean?

illegal
Not allowed by law; against the law.Also: unlawful, illicit, against the law.

Other Irish adjectives for illegal: mídhleathach (illegal), coiriúil (criminal), neamhdhlíthiúil (illegal), neamhdhleathach (illegal)

“Aindleathach” after a noun

An Irish adjective comes after its noun. Here is aindleathach after gnó (business, masculine), after gníomhaíocht (activity, feminine) and after a plural.

after a masculine noungnó aindleathachan illegal business
after a feminine noungníomhaíocht aindleathachan illegal activity
after a plural noungnóthaí aindleathachaillegal businesses

séimhiú (the h) the ending

plural
gnóthaíbusinesses
+
aindleathachaillegal, plural
=
gnóthaí aindleathachaillegal businesses

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

More illegal, most illegal, very illegal

níosmore
+
aindleathaíillegal
=
níos aindleathaímore illegal
ismost
+
aindleathaíillegal
=
is aindleathaímost illegal

Tá an cleachtas seo níos aindleathaí ná an ceann eile. This practice is more illegal than the other one.

more illegalníos aindleathaíin the past tense: ní b'aindleathaí
most illegalis aindleathaíin the past tense: ab aindleathaí
as illegal aschomh haindleathach lechomh puts an h before a vowel
very illegalan-aindleathachan- lenites, except d, t and s
too illegalró-aindleathachró- lenites

“Aindleathach” in a sentence: Irish examples

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

Dhún na gardaí gnó aindleathach sa bhaile.
The police closed an illegal business in the town.
Is druga aindleathach é sin.
That is an illegal drug.
Ní cheadaítear earraí aindleathacha ar an long.
Illegal goods are not permitted on the ship.
Tá an cleachtas seo níos aindleathaí ná an ceann eile.
This practice is more illegal than the other one.
Tá sé aindleathach páirceáil anseo.
It is illegal to park here.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Illegal in Irish: frequently asked questions

What is the Irish for illegal?

The Irish for illegal is aindleathach (pronounced “AN-yeh-lah-hukh”). It comes after the noun: gnó aindleathach, an illegal business; gníomhaíocht aindleathach, an illegal activity.

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

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

What is the plural of aindleathach?

With a plural noun aindleathach becomes aindleathacha: gnóthaí aindleathacha, gníomhaíochtaí aindleathacha.

How do you say very illegal in Irish?

an-aindleathach. Too illegal is ró-aindleathach, and as illegal as is chomh haindleathach le.

What is the opposite of 'aindleathach'?

The opposite is 'dleathach', meaning legal or lawful. 'Neamhdhleathach' and 'mídhleathach' are also used for illegal.

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