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Emission in Irish (Astú): Meaning, Pronunciation, Usage

The Irish for emission is astú, a masculine noun (plural astuithe). Ag astú is emitting, from the verb astaigh.
Updated October 2026Report a mistake

How to say “emission” in Irish

Irish:
astú
English:
emission
Word type:
noun (verbal noun)
Verbal noun of:
astaigh, to emit (ag astú, emitting)
Gender:
masculine
Pronunciation:
“AS-too”  /ˈas̪t̪uː/
Various forms
Plural:
astuithe (emissions)
Genitive singular:
astaithe, an astaithe (e.g. leibhéal an astaithe, the level of the emission)
Genitive plural:
astuithe, na n-astuithe (e.g. laghdú na n-astuithe, the reduction of the emissions)

What does “astú” mean?

emission
The act of giving off or sending out gas, heat, light or radiation; the verbal noun of the verb astaigh (emit).Also: emitting, discharge, giving off.

“Astú” as a verbal noun

After ag, astú means emitting: it is the verbal noun of the verb astaigh (to emit). A noun that follows it goes into the genitive.

agat
+
astúverbal noun
=
ag astúemitting

“Astú” with the article

The plural of emission in Irish is astuithe. Here is astú after the article (an t-alt), in the singular and the plural.

an t-astú
the emission
Masculine nouns take t before a vowel after an
na hastuithe
the emissions
Plural: na adds h before a vowel

“Astú” in a sentence: Irish examples

Common Irish sentences using astú, the Irish word for emission.

Tá astú carbóin ag dul i méid.
Carbon emission is increasing.
Caithfimid na hastuithe a laghdú go tapa.
We must reduce the emissions quickly.
Tá spriocanna astaithe leagtha síos ag an Rialtas.
The Government has set emission targets.
Is ó charranna a thagann cuid mhór den astú.
A large part of the emission comes from cars.
Tomhaiseann an gléas seo astú solais.
This device measures light emission.
Tá astuithe gás ceaptha teasa ró-ard.
Greenhouse gas emissions are too high.
Bíonn astú radaíochta ó roinnt mianraí.
Some minerals give off radiation.

Other nouns in Irish

More everyday Irish nouns to learn next.

Emission in Irish: frequently asked questions

What is the Irish for emission?

The Irish for emission is astú (pronounced “AS-too”). It’s a masculine noun and the plural is astuithe.

How do you pronounce astú in Irish?

Astú is said like “AS-too” (IPA /ˈas̪t̪uː/).

What is the plural of emission in Irish?

The plural of astú is astuithe; with the article, na hastuithe means “the emissions”. The genitive plural is astuithe, as in laghdú na n-astuithe (the reduction of the emissions).

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

Irish nouns beginning with a vowel take a prefix after certain words: an t-astú (the emission), a hastú (her emission), a n-astú (their emission), na hastuithe (the emissions).

Is astú the usual word for car or factory emissions?

Yes, astuithe is the standard term in official and environmental Irish, as in astuithe carbóin for carbon emissions.

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