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

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

How to say “illegal” in Irish

Irish:
neamhdhleathach
English:
illegal
Word type:
adjective
More illegal:
níos neamhdhleathaí
Most illegal:
is neamhdhleathaí
Plural:
neamhdhleathacha
Pronunciation:
“NYOW-yla-hoch”  /ˈnʲaũˌjlʲahəx/

What does “neamhdhleathach” 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” after a noun

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

after a masculine noungnó neamhdhleathachan illegal business
after a feminine noungníomhaíocht neamhdhleathachan illegal activity
after a plural noungnóthaí neamhdhleathachaillegal businesses

séimhiú (the h) the ending

plural
gnóthaíbusinesses
+
neamhdhleathachaillegal, plural
=
gnóthaí neamhdhleathachaillegal businesses

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

More illegal, most illegal, very illegal

níosmore
+
neamhdhleathaíillegal
=
níos neamhdhleathaímore illegal
ismost
+
neamhdhleathaíillegal
=
is neamhdhleathaímost illegal
more illegalníos neamhdhleathaíin the past tense: ní ba neamhdhleathaí
most illegalis neamhdhleathaíin the past tense: ba neamhdhleathaí
as illegal aschomh neamhdhleathach leno change after chomh
very illegalan-neamhdhleathachan- lenites, except d, t and s
too illegalróneamhdhleathachró- lenites

“Neamhdhleathach” in a sentence: Irish examples

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

Dúnadh an gnó neamhdhleathach sin anuraidh.
That illegal business was closed last year.
Fuair sé fíneáil as páirceáil neamhdhleathach.
He got a fine for illegal parking.
Fuarthas drugaí neamhdhleathacha sa charr.
Illegal drugs were found in the car.
Tá sé neamhdhleathach airgead a ghoid.
It is illegal to steal money.
Tá sé neamhdhleathach tiomáint gan árachas.
It is illegal to drive without insurance.

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 neamhdhleathach (pronounced “NYOW-yla-hoch”). It comes after the noun: gnó neamhdhleathach, an illegal business; gníomhaíocht neamhdhleathach, an illegal activity.

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

níos neamhdhleathaí is more illegal and is neamhdhleathaí is most illegal. In the past tense they become ní ba neamhdhleathaí and ba neamhdhleathaí.

What is the plural of neamhdhleathach?

With a plural noun neamhdhleathach becomes neamhdhleathacha: gnóthaí neamhdhleathacha, gníomhaíochtaí neamhdhleathacha.

How do you say very illegal in Irish?

an-neamhdhleathach. Too illegal is róneamhdhleathach, and as illegal as is chomh neamhdhleathach le.

What is the difference between 'neamhdhleathach' and 'mídhleathach'?

Both mean illegal; 'mídhleathach' is very common in official use, while 'neamhdhleathach' is also widely used with the same meaning.

What is the opposite of 'neamhdhleathach'?

The opposite is 'dleathach', meaning legal or lawful.

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