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Lunatic in Irish (Gealt): Meaning, Pronunciation, Usage

‘gealt’ also means: wild person living in the wilds

The Irish for lunatic is gealt, a feminine noun (plural gealta).
Updated October 2026Report a mistake

How to say “lunatic” in Irish

Irish:
gealt
English:
lunatic, wild person living in the wilds
Word type:
noun
Gender:
feminine, second declension
Pronunciation:
“gyalt”  /ɟal̪ˠt̪ˠ/
Various forms
Plural:
gealta (lunatics)
Genitive singular:
geilte, na geilte (e.g. gáire na geilte, the lunatic's laugh)
Genitive plural:
gealt, na ngealt (e.g. teach na ngealt, the madhouse)

What does “gealt” mean?

“Gealt” has two alternative meanings. The most common comes first.

lunatic
A person who is mad or insane, or who behaves wildly as if crazy.Also: madman, crazy person, maniac.
1 other meaning: wild person living in the wilds
2wild person living in the wilds
In old literature, a person driven mad who flees to live wild in the woods, like Suibhne Geilt.Also: wild man, madman of the woods, crazed fugitive.

Other Irish words for lunatic: gealtán (lunatic), gealtach (madman)

“Gealt” with the article

The plural of lunatic in Irish is gealta. Here is gealt after the article (an t-alt), in the singular and the plural.

an ghealt
the lunatic
Lenition: g becomes gh after an (feminine noun)
na gealta
the lunatics
Plural: no change after na

“Gealt” in a sentence: Irish examples

Common Irish sentences using gealt, the Irish word for lunatic.

Tá sé ag tiomáint ar nós gealta.
He's driving like a lunatic.
Rith an ghealt amach as an teach.
The madman ran out of the house.
Cuireadh i dteach na ngealt é fadó.
He was put in the madhouse long ago.
Ná bí i do ghealt, a Sheáin!
Don't be a lunatic, Seán!
Bhí siad ag béicíl ar nós gealt.
They were shouting like lunatics.
Is gealt cheart é nuair a bhíonn fearg air.
He's a real maniac when he's angry.
Bhí sé ag rith thart ar nós gealta.
He was running around like a lunatic.

Other nouns in Irish

More everyday Irish nouns to learn next.

Lunatic in Irish: frequently asked questions

What is the Irish for lunatic?

The Irish for lunatic is gealt (pronounced “gyalt”). It’s a feminine noun and the plural is gealta. Depending on context it can also mean wild person living in the wilds.

How do you pronounce gealt in Irish?

Gealt is said like “gyalt” (IPA /ɟal̪ˠt̪ˠ/).

What is the plural of lunatic in Irish?

The plural of gealt is gealta; with the article, na gealta means “the lunatics”. The genitive plural is gealt, as in teach na ngealt (the madhouse).

Does gealt have more than one meaning?

Yes. Gealt can mean lunatic or wild person living in the wilds, depending on context; the first is the most common.

Why does gealt change to ghealt or ngealt?

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

How do I say someone acts 'like a madman'?

Use ar nós gealt or ar nós na gealaí style phrases, for example Bhí sé ag rith ar nós gealt, 'He was running like a madman'.

Is gealt related to gealach (moon)?

Not etymologically, although the English 'lunatic' comes from the moon; gealt is a separate old Irish word for a frenzied person.

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