HeyRua Get the app

Heater in Irish (Teasaire): Meaning, Pronunciation, Usage

The Irish for heater is teasaire, a masculine noun (plural teasairí).
Updated October 2026Report a mistake

How to say “heater” in Irish

Irish:
teasaire
English:
heater
Word type:
noun
Gender:
masculine
Pronunciation:
“TYAS-ir-uh”  /tʲasəɾʲə/
Various forms
Plural:
teasairí (heaters)
Genitive singular:
teasaire, an teasaire (e.g. cnaipe an teasaire, the heater's button)
Genitive plural:
teasairí, na dteasairí (e.g. teocht na dteasairí, the temperature of the heaters)

What does “teasaire” mean?

heater
A device that produces heat to warm a room, water or a vehicle.Also: radiator, fire, space heater.

Other Irish words for heater: téitheoir (heater), radaitheoir (radiator)

“Teasaire” with the article

The plural of heater in Irish is teasairí. Here is teasaire after the article (an t-alt), in the singular and the plural.

an teasaire
the heater
No change after an
na teasairí
the heaters
Plural: no change after na

“Teasaire” in a sentence: Irish examples

Common Irish sentences using teasaire, the Irish word for heater.

Cuir an teasaire ar siúl, tá sé fuar.
Turn on the heater, it's cold.
Tá teasaire nua againn sa seomra suí.
We have a new heater in the sitting room.
Níl mo theasaire ag obair ar chor ar bith.
My heater isn't working at all.
Ná fág do chóta in aice leis an teasaire.
Don't leave your coat beside the heater.
Cheannaigh siad dhá theasaire leictreacha inné.
They bought two electric heaters yesterday.
Tá plocóid an teasaire briste.
The heater's plug is broken.
Bíonn na teasairí ar siúl sa scoil gach maidin.
The heaters are on in the school every morning.

Other nouns in Irish

More everyday Irish nouns to learn next.

Heater in Irish: frequently asked questions

What is the Irish for heater?

The Irish for heater is teasaire (pronounced “TYAS-ir-uh”). It’s a masculine noun and the plural is teasairí.

How do you pronounce teasaire in Irish?

Teasaire is said like “TYAS-ir-uh” (IPA /tʲasəɾʲə/).

What is the plural of heater in Irish?

The plural of teasaire is teasairí; with the article, na teasairí means “the heaters”. The genitive plural is teasairí, as in teocht na dteasairí (the temperature of the heaters).

Why does teasaire change to theasaire or dteasaire?

Irish changes the start of some words after certain words. After mo (my) teasaire becomes mo theasaire (lenition), and after ár (our) or i (in) it becomes ár dteasaire (eclipsis).

What is the difference between teasaire and radaitheoir?

A teasaire is any heater, often a portable one, while a radaitheoir is a radiator connected to central heating (téamh lárnach).

Learn Irish by
actually speaking it

Learn everyday Irish words like teasaire through guided conversation with Rua.

7-day free trial. Cancel anytime.

The HeyRua app home screen