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Insulation in Irish (Insliú): Meaning, Pronunciation, Usage

The Irish for insulation is insliú, a masculine noun. Ag insliú is insulating, from the verb insligh.
Updated October 2026Report a mistake

How to say “insulation” in Irish

Irish:
insliú
English:
insulation
Word type:
noun (verbal noun)
Verbal noun of:
insligh, to insulate (ag insliú, insulating)
Gender:
masculine, fourth declension
Pronunciation:
“IN-shlyoo”  /ˈɪnʲʃlʲuː/
Various forms
Genitive singular:
inslithe, an inslithe (e.g. tiús an inslithe, the thickness of the insulation)

What does “insliú” mean?

insulation
Material or the act of covering something so that heat, sound or electricity cannot pass through easily; the verbal noun of insligh.Also: insulating, lagging.

“Insliú” as a verbal noun

After ag, insliú means insulating: it is the verbal noun of the verb insligh (to insulate). A noun that follows it goes into the genitive.

agat
+
insliúverbal noun
=
ag insliúinsulating

“Insliú” with the article

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

an t-insliú
the insulation
Masculine nouns take t before a vowel after an

“Insliú” in a sentence: Irish examples

Common Irish sentences using insliú, the Irish word for insulation.

Tá insliú maith sa teach seo.
This house has good insulation.
Chuireamar insliú nua san áiléar anuraidh.
We put new insulation in the attic last year.
Coinníonn an t-insliú an teas istigh.
The insulation keeps the heat in.
Bhí costas an inslithe níos airde ná mar a cheapamar.
The insulation cost more than we thought.
Tá an t-insliú ar an tsreang briste.
The insulation on the wire is broken.
Tá deontas ar fáil le haghaidh inslithe.
There is a grant available for insulation.
Gan insliú, bíonn an teach fuar sa gheimhreadh.
Without insulation, the house is cold in winter.

Other nouns in Irish

More everyday Irish nouns to learn next.

Insulation in Irish: frequently asked questions

What is the Irish for insulation?

The Irish for insulation is insliú (pronounced “IN-shlyoo”). It’s a masculine noun.

How do you pronounce insliú in Irish?

Insliú is said like “IN-shlyoo” (IPA /ˈɪnʲʃlʲuː/).

Does insliú have a plural?

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

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

Irish nouns beginning with a vowel take a prefix after certain words: an t-insliú (the insulation), a hinsliú (her insulation), a n-insliú (their insulation).

What is the word for an electrical insulator?

An insulator is 'inslitheoir', while 'insliú' is the insulation itself or the act of insulating.

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