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Deceleration in Irish (Luasmhoilliú): Meaning, Pronunciation, Usage

The Irish for deceleration is luasmhoilliú, a masculine noun. Ag luasmhoilliú is decelerating, from the verb luasmhoilligh.
Updated October 2026Report a mistake

How to say “deceleration” in Irish

Irish:
luasmhoilliú
English:
deceleration
Word type:
noun (verbal noun)
Verbal noun of:
luasmhoilligh, to decelerate (ag luasmhoilliú, decelerating)
Gender:
masculine
Pronunciation:
“LOOS-wil-oo”  /ˈl̪ˠuəsˌwɪlʲuː/
Various forms
Genitive singular:
luasmhoillithe, an luasmhoillithe (e.g. ráta luasmhoillithe, rate of deceleration)

What does “luasmhoilliú” mean?

deceleration
The act of slowing down or reducing speed; the verbal noun of luasmhoilligh, to decelerate.Also: slowing down, retardation, decelerating.

“Luasmhoilliú” as a verbal noun

After ag, luasmhoilliú means decelerating: it is the verbal noun of the verb luasmhoilligh (to decelerate). A noun that follows it goes into the genitive.

agat
+
luasmhoilliúverbal noun
=
ag luasmhoilliúdecelerating

“Luasmhoilliú” with the article

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

an luasmhoilliú
the deceleration
No change after an

“Luasmhoilliú” in a sentence: Irish examples

Common Irish sentences using luasmhoilliú, the Irish word for deceleration.

Is é luasmhoilliú an rud contrártha le luasghéarú.
Deceleration is the opposite of acceleration.
Tháinig luasmhoilliú tobann ar an traein.
The train decelerated suddenly.
Ríomh ráta an luasmhoillithe sa cheist seo.
Calculate the rate of deceleration in this question.
Bhí an luasmhoilliú róghéar don phaisinéir.
The deceleration was too sharp for the passenger.
Tomhaistear luasmhoilliú i méadair sa soicind cearnaithe.
Deceleration is measured in metres per second squared.
Ba chúis le luasmhoilliú an eitleáin an ghaoth láidir.
The strong wind caused the plane to slow down.
Bhí luasmhoilliú mór i gceist nuair a bhrúigh sí na coscáin.
There was a big deceleration when she pressed the brakes.

Other nouns in Irish

More everyday Irish nouns to learn next.

Deceleration in Irish: frequently asked questions

What is the Irish for deceleration?

The Irish for deceleration is luasmhoilliú (pronounced “LOOS-wil-oo”). It’s a masculine noun.

How do you pronounce luasmhoilliú in Irish?

Luasmhoilliú is said like “LOOS-wil-oo” (IPA /ˈl̪ˠuəsˌwɪlʲuː/).

Does luasmhoilliú have a plural?

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

What is the opposite of luasmhoilliú?

The opposite is luasghéarú, acceleration. Both are built on luas, speed.

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