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Infiltration in Irish (Insíothlú): Meaning, Pronunciation, Usage

The Irish for infiltration is insíothlú, a masculine noun. Ag insíothlú is infiltrating, from the verb insíothlaigh.
Updated October 2026Report a mistake

How to say “infiltration” in Irish

Irish:
insíothlú
English:
infiltration
Word type:
noun (verbal noun)
Verbal noun of:
insíothlaigh, to infiltrate (ag insíothlú, infiltrating)
Gender:
masculine
Pronunciation:
“IN-shee-hloo”  /ˈɪnʲʃiːhl̪ˠuː/
Various forms
Genitive singular:
insíothlaithe, an insíothlaithe (e.g. ráta insíothlaithe, rate of infiltration)

What does “insíothlú” mean?

infiltration
The process of a liquid, such as water, seeping or filtering gradually into soil, rock or another material; it is the verbal noun of the verb insíothlaigh.Also: seepage, percolation, infiltrating.

“Insíothlú” as a verbal noun

After ag, insíothlú means infiltrating: it is the verbal noun of the verb insíothlaigh (to infiltrate). A noun that follows it goes into the genitive.

agat
+
insíothlúverbal noun
=
ag insíothlúinfiltrating

“Insíothlú” with the article

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

an t-insíothlú
the infiltration
Masculine nouns take t before a vowel after an

“Insíothlú” in a sentence: Irish examples

Common Irish sentences using insíothlú, the Irish word for infiltration.

Is próiseas mall é insíothlú an uisce.
The infiltration of water is a slow process.
Bíonn an t-insíothlú níos tapúla i ngaineamh.
Infiltration is faster in sand.
Thomhais na heolaithe ráta an insíothlaithe.
The scientists measured the rate of infiltration.
Laghdaíonn talamh crua insíothlú na báistí.
Hard ground reduces the infiltration of rain.
Tá insíothlú ag tarlú sa bhalla seo.
Seepage is happening in this wall.
Rinneamar staidéar ar insíothlú san ithir.
We studied infiltration in the soil.
Cuireann an fásra cosc ar insíothlú lag.
The vegetation prevents poor infiltration.

Other nouns in Irish

More everyday Irish nouns to learn next.

Infiltration in Irish: frequently asked questions

What is the Irish for infiltration?

The Irish for infiltration is insíothlú (pronounced “IN-shee-hloo”). It’s a masculine noun.

How do you pronounce insíothlú in Irish?

Insíothlú is said like “IN-shee-hloo” (IPA /ˈɪnʲʃiːhl̪ˠuː/).

Does insíothlú have a plural?

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

Why does insíothlú sometimes have a t or h in front of it?

Irish nouns beginning with a vowel take a prefix after certain words: an t-insíothlú (the infiltration), a hinsíothlú (her infiltration), a n-insíothlú (their infiltration).

Is 'insíothlú' used for spies infiltrating an organisation?

It is mainly a technical term for liquids seeping into a material; for people infiltrating a group, 'insíothlú' may be seen in specialist texts, but check context, as 'sleamhnú isteach' is often used informally.

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