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Pollution in Irish (Truailliú): Meaning, Pronunciation, Usage

‘truailliú’ also means: corruption

The Irish for pollution is truailliú, a masculine noun. Ag truailliú is polluting, from the verb truailligh.
Updated October 2026Report a mistake

How to say “pollution” in Irish

Irish:
truailliú
English:
pollution, corruption
Word type:
noun (verbal noun)
Verbal noun of:
truailligh, to pollute (ag truailliú, polluting)
Gender:
masculine
Pronunciation:
“TROO-uh-lee-oo”  /ˈt̪ˠɾˠuəlʲuː/
Various forms
Genitive singular:
truaillithe, an truaillithe (e.g. leibhéal an truaillithe, the level of pollution)

What does “truailliú” mean?

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

pollution
The contamination of air, water or land by harmful substances.Also: contamination, environmental pollution.
1 other meaning: corruption
2corruption
The act of corrupting, defiling or debasing something; it is the verbal noun of the verb truailligh.Also: defilement, debasement, adulteration.

“Truailliú” as a verbal noun

After ag, truailliú means polluting: it is the verbal noun of the verb truailligh (to pollute). A noun that follows it goes into the genitive.

agat
+
truailliúverbal noun
=
ag truailliúpolluting

“Truailliú” with the article

Here is truailliú after the article (an t-alt).

an truailliú
the pollution
No change after an

“Truailliú” in a sentence: Irish examples

Common Irish sentences using truailliú, the Irish word for pollution.

Is fadhb mhór é truailliú aeir sa chathair.
Air pollution is a big problem in the city.
Tá an truailliú ag milleadh na habhann.
Pollution is ruining the river.
Ní mór dúinn foinse an truaillithe a aimsiú.
We need to find the source of the pollution.
Rinne na feirmeoirí gearán faoi thruailliú an uisce.
The farmers complained about the water pollution.
Tá laghdú ar an truailliú i mbliana.
There is a reduction in pollution this year.
Cuireann an trácht le truailliú torainn freisin.
Traffic also adds to noise pollution.
Labhair an múinteoir faoin truailliú sa rang.
The teacher talked about pollution in class.

Other nouns in Irish

More everyday Irish nouns to learn next.

Pollution in Irish: frequently asked questions

What is the Irish for pollution?

The Irish for pollution is truailliú (pronounced “TROO-uh-lee-oo”). It’s a masculine noun. Depending on context it can also mean corruption.

How do you pronounce truailliú in Irish?

Truailliú is said like “TROO-uh-lee-oo” (IPA /ˈt̪ˠɾˠuəlʲuː/).

Does truailliú have a plural?

No plural form is given for truailliú in the standard. Many abstract and mass nouns in Irish have no plural.

Does truailliú have more than one meaning?

Yes. Truailliú can mean pollution or corruption, depending on context; the first is the most common.

Why does truailliú change to thruailliú or dtruailliú?

Irish changes the start of some words after certain words. After mo (my) truailliú becomes mo thruailliú (lenition), and after ár (our) or i (in) it becomes ár dtruailliú (eclipsis).

What is the difference between truailliú and truaillitheán?

Truailliú is the process of pollution itself, while truaillitheán is a pollutant, the substance that causes it.

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