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Polluting in Irish (truaillitheach): Meaning, Forms, Examples

Other uses of ‘truaillitheach’: corrupting

The Irish for polluting is truaillitheach: gás truaillitheach, a polluting gas.
Updated October 2026Report a mistake

How to say “polluting” in Irish

Irish:
truaillitheach
English:
polluting, corrupting
Word type:
adjective
More polluting:
níos truaillithí
Most polluting:
is truaillithí
Plural:
truaillitheacha
Pronunciation:
“TROO-al-ee-hukh”  /ˈt̪ˠɾˠuəlʲihəx/

What does “truaillitheach” mean?

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

polluting
Causing pollution or contamination of air, water or land.Also: contaminating, pollutant.
1 other meaning: corrupting
2corrupting
Having a corrupting or defiling influence, morally or otherwise.Also: defiling, corruptive, debasing.

“Truaillitheach” after a noun

An Irish adjective comes after its noun. Here is truaillitheach after gás (gas, masculine), after monarcha (factory, feminine) and after a plural.

after a masculine noungás truaillitheacha polluting gas
after a feminine nounmonarcha thruaillitheacha polluting factory
after a plural noungáis thruaillitheachapolluting gases

séimhiú (the h) the ending

feminine
monarchafactory
+
truaillitheachpolluting
=
monarcha thruaillitheacha polluting factory

After a feminine noun the adjective gets a séimhiú, an h after its first letter: monarcha thruaillitheach. After a masculine noun it stays as it is: gás truaillitheach.

plural
gáisgases
+
truaillitheachapolluting, plural
=
gáis thruaillitheachapolluting gases

With a plural noun the adjective takes its plural form, truaillitheacha. It also gets an h after a plural that ends in a slender consonant: gáis thruaillitheacha; after other plurals it does not: monarchana truaillitheacha.

More polluting, most polluting, very polluting

níosmore
+
truaillithípolluting
=
níos truaillithímore polluting
ismost
+
truaillithípolluting
=
is truaillithímost polluting

Tá gual níos truaillithí ná gás nádúrtha. Coal is more polluting than natural gas.

more pollutingníos truaillithíin the past tense: ní ba thruaillithí
most pollutingis truaillithíin the past tense: ba thruaillithí
as polluting aschomh truaillitheach leno change after chomh
very pollutingan-truaillitheachan- lenites, except d, t and s
too pollutingróthruaillitheachró- lenites

“Truaillitheach” in a sentence: Irish examples

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

Scaoileann an mhonarcha gás truaillitheach isteach san aer.
The factory releases a polluting gas into the air.
Is substaint thruaillitheach í seo.
This is a polluting substance.
Ní mór ceimiceáin thruaillitheacha a sheachaint.
Polluting chemicals must be avoided.
Tá gual níos truaillithí ná gás nádúrtha.
Coal is more polluting than natural gas.
Tá an deatach sin an-truaillitheach.
That smoke is very polluting.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Polluting in Irish: frequently asked questions

What is the Irish for polluting?

The Irish for polluting is truaillitheach (pronounced “TROO-al-ee-hukh”). It comes after the noun: gás truaillitheach, a polluting gas; monarcha thruaillitheach, a polluting factory.

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

níos truaillithí is more polluting and is truaillithí is most polluting. In the past tense they become ní ba thruaillithí and ba thruaillithí.

Why does truaillitheach become thruaillitheach?

After a feminine singular noun an adjective is lenited: it gets an h after its first letter. So monarcha thruaillitheach (a polluting factory) but gás truaillitheach (a polluting gas), because gás is masculine.

What is the plural of truaillitheach?

With a plural noun truaillitheach becomes truaillitheacha: gáis thruaillitheacha, monarchana truaillitheacha. After a plural that ends in a slender consonant it is lenited as well.

How do you say very polluting in Irish?

an-truaillitheach. Too polluting is róthruaillitheach, and as polluting as is chomh truaillitheach le.

Does truaillitheach have more than one meaning?

Yes. Truaillitheach can mean polluting or corrupting, depending on context; the first is the most common.

What is the difference between 'truaillitheach' and 'truaillithe'?

'Truaillitheach' means polluting, causing pollution, while 'truaillithe' means polluted, already contaminated: 'uisce truaillithe' is polluted water.

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