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Chestnut in Irish (Castán): Meaning, Pronunciation, Usage

The Irish for chestnut is castán, a masculine noun (plural castáin).
Updated October 2026Report a mistake

How to say “chestnut” in Irish

Irish:
castán
English:
chestnut
Word type:
noun
Gender:
masculine, first declension
Pronunciation:
“kas-TAWN”  /ˈkasˠt̪ˠaːnˠ/
Various forms
Plural:
castáin (chestnuts)
Genitive singular:
castáin, an chastáin (e.g. blas an chastáin, the taste of the chestnut)
Genitive plural:
castán, na gcastán (e.g. mála castán, a bag of chestnuts)

What does “castán” mean?

chestnut
The shiny brown nut of the chestnut tree, especially the edible sweet chestnut.Also: sweet chestnut, conker, chestnut nut.

“Castán” with the article

The plural of chestnut in Irish is castáin. Here is castán after the article (an t-alt), in the singular and the plural.

an castán
the chestnut
No change after an
na castáin
the chestnuts
Plural: no change after na

“Castán” in a sentence: Irish examples

Common Irish sentences using castán, the Irish word for chestnut.

Phioc mé castán den talamh sa pháirc.
I picked a chestnut up off the ground in the park.
Tá an castán seo an-te fós.
This chestnut is still very hot.
Díoltar castáin rósta ar an tsráid sa gheimhreadh.
Roasted chestnuts are sold on the street in winter.
Bhain sí an craiceann den chastán go cúramach.
She carefully peeled the skin off the chestnut.
Cheannaigh m'athair mála castán ar an margadh.
My father bought a bag of chestnuts at the market.
Tá dath an chastáin ar a cuid gruaige.
Her hair is the colour of a chestnut.
Chuir mé na castáin san oigheann ar feadh fiche nóiméad.
I put the chestnuts in the oven for twenty minutes.

Other nouns in Irish

More everyday Irish nouns to learn next.

Chestnut in Irish: frequently asked questions

What is the Irish for chestnut?

The Irish for chestnut is castán (pronounced “kas-TAWN”). It’s a masculine noun and the plural is castáin.

How do you pronounce castán in Irish?

Castán is said like “kas-TAWN” (IPA /ˈkasˠt̪ˠaːnˠ/).

What is the plural of chestnut in Irish?

The plural of castán is castáin; with the article, na castáin means “the chestnuts”. The genitive plural is castán, as in mála castán (a bag of chestnuts).

Why does castán change to chastán or gcastán?

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

What is a horse chestnut or conker in Irish?

The inedible horse chestnut is 'castán capaill'; the edible sweet chestnut is simply 'castán'.

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