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Furnace in Irish (Foirnéis): Meaning, Pronunciation, Usage

The Irish for furnace is foirnéis, a feminine noun (plural foirnéisí).
Updated October 2026Report a mistake

How to say “furnace” in Irish

Irish:
foirnéis
English:
furnace
Word type:
noun
Gender:
feminine, second declension
Pronunciation:
“FOR-naysh”  /ˈfˠɔɾʲn̪ʲeːʃ/
Various forms
Plural:
foirnéisí (furnaces)
Genitive singular:
foirnéise, na foirnéise (e.g. doras na foirnéise, the door of the furnace)
Genitive plural:
foirnéisí, na bhfoirnéisí (e.g. teas na bhfoirnéisí, the heat of the furnaces)

What does “foirnéis” mean?

furnace
An enclosed structure in which a very hot fire is kept, used for heating buildings or for melting metal.Also: kiln, smelter, blast furnace.

“Foirnéis” with the article

The plural of furnace in Irish is foirnéisí. Here is foirnéis after the article (an t-alt), in the singular and the plural.

an fhoirnéis
the furnace
Lenition: f becomes fh after an (feminine noun)
na foirnéisí
the furnaces
Plural: no change after na

“Foirnéis” in a sentence: Irish examples

Common Irish sentences using foirnéis, the Irish word for furnace.

Tá an fhoirnéis ag dó ó mhaidin.
The furnace has been burning since morning.
Chuir sé gual san fhoirnéis.
He put coal in the furnace.
Bhí teas na foirnéise dochreidte.
The heat of the furnace was incredible.
Oibríonn m'athair le foirnéis sa mhonarcha.
My father works with a furnace in the factory.
Dúnadh na foirnéisí go léir anuraidh.
All the furnaces were closed last year.
Tá sé cosúil le foirnéis istigh anseo!
It's like a furnace in here!
Leádh an t-iarann i bhfoirnéis mhór.
The iron was melted in a big furnace.

Other nouns in Irish

More everyday Irish nouns to learn next.

Furnace in Irish: frequently asked questions

What is the Irish for furnace?

The Irish for furnace is foirnéis (pronounced “FOR-naysh”). It’s a feminine noun and the plural is foirnéisí.

How do you pronounce foirnéis in Irish?

Foirnéis is said like “FOR-naysh” (IPA /ˈfˠɔɾʲn̪ʲeːʃ/).

What is the plural of furnace in Irish?

The plural of foirnéis is foirnéisí; with the article, na foirnéisí means “the furnaces”. The genitive plural is foirnéisí, as in teas na bhfoirnéisí (the heat of the furnaces).

Why does foirnéis change to fhoirnéis or bhfoirnéis?

Irish changes the start of some words after certain words. After mo (my) foirnéis becomes m'fhoirnéis (lenition), and after ár (our) or i (in) it becomes ár bhfoirnéis (eclipsis).

What is the difference between 'foirnéis' and 'sorn'?

'Foirnéis' is a large industrial or heating furnace, while 'sorn' is usually a stove or kitchen range.

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