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To infiltrate in Irish (insíothlaigh): Meaning, Conjugation, Examples

The Irish for to infiltrate is insíothlaigh; ag insíothlú is infiltrating.
Updated October 2026Report a mistake

How to say “to infiltrate” in Irish

Irish:
insíothlaigh
English:
to infiltrate
Word type:
verb, second-conjugation
Verbal noun:
insíothlú (ag insíothlú, infiltrating)
Verbal adjective:
insíothlaithe
Pronunciation:
“IN-shee-hlee”  /ɪnʲʃiːhlˠə/

What does “insíothlaigh” mean?

to infiltrate
To pass slowly into or through something, such as a liquid seeping into soil, or people secretly entering an organisation.Also: seep in, percolate, filter in.

“Insíothlaigh” in the different tenses

Every form follows An Caighdeán Oifigiúil.

Aimsir Chaite (Past)

PersonPositiveNegativeQuestion
mé (I)D'insíothlaigh méI infiltratedNíor insíothlaigh méI did not infiltrateAr insíothlaigh mé?Did I infiltrate?
tú (you)D'insíothlaigh túYou infiltratedNíor insíothlaigh túYou did not infiltrateAr insíothlaigh tú?Did you infiltrate?
sé / sí (he / she)D'insíothlaigh sé / síHe infiltratedNíor insíothlaigh sé / síHe did not infiltrateAr insíothlaigh sé / sí?Did he infiltrate?
sinn (we)D'insíothlaíomarWe infiltratedNíor insíothlaíomarWe did not infiltrateAr insíothlaíomar?Did we infiltrate?
sibh (you, plural)D'insíothlaigh sibhYou infiltratedNíor insíothlaigh sibhYou did not infiltrateAr insíothlaigh sibh?Did you infiltrate?
siad (they)D'insíothlaigh siadThey infiltratedNíor insíothlaigh siadThey did not infiltrateAr insíothlaigh siad?Did they infiltrate?
saorbhriathar (autonomous)InsíothlaíodhNíor insíothlaíodhAr insíothlaíodh?

Aimsir Láithreach (Present)

PersonPositiveNegativeQuestion
mé (I)InsíothlaímI infiltrateNí insíothlaímI do not infiltrateAn insíothlaím?Do I infiltrate?
tú (you)Insíothlaíonn túYou infiltrateNí insíothlaíonn túYou do not infiltrateAn insíothlaíonn tú?Do you infiltrate?
sé / sí (he / she)Insíothlaíonn sé / síHe infiltratesNí insíothlaíonn sé / síHe does not infiltrateAn insíothlaíonn sé / sí?Does he infiltrate?
sinn (we)InsíothlaímidWe infiltrateNí insíothlaímidWe do not infiltrateAn insíothlaímid?Do we infiltrate?
sibh (you, plural)Insíothlaíonn sibhYou infiltrateNí insíothlaíonn sibhYou do not infiltrateAn insíothlaíonn sibh?Do you infiltrate?
siad (they)Insíothlaíonn siadThey infiltrateNí insíothlaíonn siadThey do not infiltrateAn insíothlaíonn siad?Do they infiltrate?
saorbhriathar (autonomous)InsíothlaítearNí insíothlaítearAn insíothlaítear?

Aimsir Fháistineach (Future)

PersonPositiveNegativeQuestion
mé (I)Insíothlóidh méI will infiltrateNí insíothlóidh méI will not infiltrateAn insíothlóidh mé?Will I infiltrate?
tú (you)Insíothlóidh túYou will infiltrateNí insíothlóidh túYou will not infiltrateAn insíothlóidh tú?Will you infiltrate?
sé / sí (he / she)Insíothlóidh sé / síHe will infiltrateNí insíothlóidh sé / síHe will not infiltrateAn insíothlóidh sé / sí?Will he infiltrate?
sinn (we)InsíothlóimidWe will infiltrateNí insíothlóimidWe will not infiltrateAn insíothlóimid?Will we infiltrate?
sibh (you, plural)Insíothlóidh sibhYou will infiltrateNí insíothlóidh sibhYou will not infiltrateAn insíothlóidh sibh?Will you infiltrate?
siad (they)Insíothlóidh siadThey will infiltrateNí insíothlóidh siadThey will not infiltrateAn insíothlóidh siad?Will they infiltrate?
saorbhriathar (autonomous)InsíothlófarNí insíothlófarAn insíothlófar?

Modh Coinníollach (Conditional)

PersonPositiveNegativeQuestion
mé (I)D'insíothlóinnI would infiltrateNí insíothlóinnI would not infiltrateAn insíothlóinn?Would I infiltrate?
tú (you)D'insíothlófáYou would infiltrateNí insíothlófáYou would not infiltrateAn insíothlófá?Would you infiltrate?
sé / sí (he / she)D'insíothlódh sé / síHe would infiltrateNí insíothlódh sé / síHe would not infiltrateAn insíothlódh sé / sí?Would he infiltrate?
sinn (we)D'insíothlóimisWe would infiltrateNí insíothlóimisWe would not infiltrateAn insíothlóimis?Would we infiltrate?
sibh (you, plural)D'insíothlódh sibhYou would infiltrateNí insíothlódh sibhYou would not infiltrateAn insíothlódh sibh?Would you infiltrate?
siad (they)D'insíothlóidísThey would infiltrateNí insíothlóidísThey would not infiltrateAn insíothlóidís?Would they infiltrate?
saorbhriathar (autonomous)D'insíothlófaíNí insíothlófaíAn insíothlófaí?

“Insíothlaigh” in a sentence: Irish examples

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

D'insíothlaigh an t-uisce isteach san ithir.
The water infiltrated into the soil.
Insíothlaíonn uisce na báistí tríd an gcarraig.
The rainwater infiltrates through the rock.
Insíothlóidh an t-uisce isteach sa talamh go mall.
The water will infiltrate slowly into the ground.
D'insíothlódh an t-uisce dá mbeadh an ithir tirim.
The water would infiltrate if the soil were dry.
Níor insíothlaigh an t-uisce tríd an gcré.
The water did not infiltrate through the clay.
Ar insíothlaigh spiairí isteach san eagraíocht?
Did spies infiltrate the organisation?

Other verbs in Irish

More everyday Irish verbs to learn next.

To infiltrate in Irish: frequently asked questions

What is the Irish for to infiltrate?

The Irish for to infiltrate is insíothlaigh (pronounced “IN-shee-hlee”). It is a second-conjugation verb; the verbal noun is insíothlú.

What is the verbal noun of insíothlaigh?

The verbal noun of insíothlaigh is insíothlú, used after ag for the continuous: ag insíothlú (infiltrating). The verbal adjective is insíothlaithe.

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

Past: D'insíothlaigh mé; negative Níor insíothlaigh mé; question Ar insíothlaigh mé?. Future: Insíothlóidh mé; negative Ní insíothlóidh mé; question An insíothlóidh mé?.

What is the modh coinníollach of insíothlaigh?

The conditional (modh coinníollach) first person is D'insíothlóinn (I would infiltrate); negative Ní insíothlóinn; question An insíothlóinn?.

How is 'insíothlaigh' related to 'síothlaigh'?

'Síothlaigh' means to strain or filter, and 'insíothlaigh' adds the prefix 'in-' to mean filter into, infiltrate. It is mostly used in technical or scientific writing.

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