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To pollute in Irish (truailligh): Meaning, Conjugation, Examples

Other uses of ‘truailligh’: corrupt · defile · adulterate

The Irish for to pollute is truailligh; ag truailliú is polluting.
Updated October 2026Report a mistake

How to say “to pollute” in Irish

Irish:
truailligh
English:
to pollute, corrupt, defile, adulterate
Word type:
verb, second-conjugation
Verbal noun:
truailliú (ag truailliú, polluting)
Verbal adjective:
truaillithe
Pronunciation:
“TROO-lee”  /ˈt̪ˠɾˠuəlʲiː/

What does “truailligh” mean?

“Truailligh” has four alternative meanings. The most common comes first.

to pollute
To make air, water or land dirty and harmful.Also: contaminate, taint, poison.
3 other meanings: corrupt or defile or adulterate
2to corrupt
To make someone or something morally bad or dishonest.Also: deprave, debase, pervert.
3to defile
To make something holy or pure unclean or disrespected.Also: desecrate, profane, sully.
4to adulterate
To make food or a substance impure by adding something to it.Also: contaminate, spoil.

“Truailligh” in the different tenses

Every form follows An Caighdeán Oifigiúil.

Aimsir Chaite (Past)

PersonPositiveNegativeQuestion
mé (I)Thruailligh méI pollutedNíor thruailligh méI did not polluteAr thruailligh mé?Did I pollute?
tú (you)Thruailligh túYou pollutedNíor thruailligh túYou did not polluteAr thruailligh tú?Did you pollute?
sé / sí (he / she)Thruailligh sé / síHe pollutedNíor thruailligh sé / síHe did not polluteAr thruailligh sé / sí?Did he pollute?
sinn (we)ThruaillíomarWe pollutedNíor thruaillíomarWe did not polluteAr thruaillíomar?Did we pollute?
sibh (you, plural)Thruailligh sibhYou pollutedNíor thruailligh sibhYou did not polluteAr thruailligh sibh?Did you pollute?
siad (they)Thruailligh siadThey pollutedNíor thruailligh siadThey did not polluteAr thruailligh siad?Did they pollute?
saorbhriathar (autonomous)TruaillíodhNíor truaillíodhAr truaillíodh?

Aimsir Láithreach (Present)

PersonPositiveNegativeQuestion
mé (I)TruaillímI polluteNí thruaillímI do not polluteAn dtruaillím?Do I pollute?
tú (you)Truaillíonn túYou polluteNí thruaillíonn túYou do not polluteAn dtruaillíonn tú?Do you pollute?
sé / sí (he / she)Truaillíonn sé / síHe pollutesNí thruaillíonn sé / síHe does not polluteAn dtruaillíonn sé / sí?Does he pollute?
sinn (we)TruaillímidWe polluteNí thruaillímidWe do not polluteAn dtruaillímid?Do we pollute?
sibh (you, plural)Truaillíonn sibhYou polluteNí thruaillíonn sibhYou do not polluteAn dtruaillíonn sibh?Do you pollute?
siad (they)Truaillíonn siadThey polluteNí thruaillíonn siadThey do not polluteAn dtruaillíonn siad?Do they pollute?
saorbhriathar (autonomous)TruaillítearNí thruaillítearAn dtruaillítear?

Aimsir Fháistineach (Future)

PersonPositiveNegativeQuestion
mé (I)Truailleoidh méI will polluteNí thruailleoidh méI will not polluteAn dtruailleoidh mé?Will I pollute?
tú (you)Truailleoidh túYou will polluteNí thruailleoidh túYou will not polluteAn dtruailleoidh tú?Will you pollute?
sé / sí (he / she)Truailleoidh sé / síHe will polluteNí thruailleoidh sé / síHe will not polluteAn dtruailleoidh sé / sí?Will he pollute?
sinn (we)TruailleoimidWe will polluteNí thruailleoimidWe will not polluteAn dtruailleoimid?Will we pollute?
sibh (you, plural)Truailleoidh sibhYou will polluteNí thruailleoidh sibhYou will not polluteAn dtruailleoidh sibh?Will you pollute?
siad (they)Truailleoidh siadThey will polluteNí thruailleoidh siadThey will not polluteAn dtruailleoidh siad?Will they pollute?
saorbhriathar (autonomous)TruailleofarNí thruailleofarAn dtruailleofar?

Modh Coinníollach (Conditional)

PersonPositiveNegativeQuestion
mé (I)ThruailleoinnI would polluteNí thruailleoinnI would not polluteAn dtruailleoinn?Would I pollute?
tú (you)ThruailleofáYou would polluteNí thruailleofáYou would not polluteAn dtruailleofá?Would you pollute?
sé / sí (he / she)Thruailleodh sé / síHe would polluteNí thruailleodh sé / síHe would not polluteAn dtruailleodh sé / sí?Would he pollute?
sinn (we)ThruailleoimisWe would polluteNí thruailleoimisWe would not polluteAn dtruailleoimis?Would we pollute?
sibh (you, plural)Thruailleodh sibhYou would polluteNí thruailleodh sibhYou would not polluteAn dtruailleodh sibh?Would you pollute?
siad (they)ThruailleoidísThey would polluteNí thruailleoidísThey would not polluteAn dtruailleoidís?Would they pollute?
saorbhriathar (autonomous)ThruailleofaíNí thruailleofaíAn dtruailleofaí?

“Truailligh” in a sentence: Irish examples

Past, present, future and conditional, with a negative and a question.

Thruailligh an mhonarcha an abhainn.
The factory polluted the river.
Truaillíonn na carranna an t-aer sa chathair.
The cars pollute the air in the city.
Truailleoidh an ceimiceán sin an talamh.
That chemical will contaminate the land.
Thruailleodh an t-airgead é dá nglacfadh sé leis.
The money would corrupt him if he accepted it.
Níor thruailligh siad an fharraige riamh.
They never polluted the sea.
Ar thruailligh an ola an trá?
Did the oil pollute the beach?

Other verbs in Irish

More everyday Irish verbs to learn next.

To pollute in Irish: frequently asked questions

What is the Irish for to pollute?

The Irish for to pollute is truailligh (pronounced “TROO-lee”). It is a second-conjugation verb; the verbal noun is truailliú.

What is the verbal noun of truailligh?

The verbal noun of truailligh is truailliú, used after ag for the continuous: ag truailliú (polluting). The verbal adjective is truaillithe.

How do you say truailligh in the past and the future?

Past: Thruailligh mé; negative Níor thruailligh mé; question Ar thruailligh mé?. Future: Truailleoidh mé; negative Ní thruailleoidh mé; question An dtruailleoidh mé?.

What is the modh coinníollach of truailligh?

The conditional (modh coinníollach) first person is Thruailleoinn (I would pollute); negative Ní thruailleoinn; question An dtruailleoinn?.

Does truailligh have more than one meaning?

Yes. Truailligh can mean to pollute, to corrupt, to defile or to adulterate, depending on context; the first is the most common.

How do you say 'pollution' in Irish?

The verbal noun 'truailliú' is used for pollution, as in 'truailliú aeir' (air pollution).

What is the difference between 'truailligh' and 'salaigh'?

'Salaigh' simply means to make dirty, while 'truailligh' means to pollute, contaminate or corrupt, often in a more serious or moral sense.

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