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Gill in Irish (Geolbhach): Meaning, Pronunciation, Usage

‘geolbhach’ also means: jaw

The Irish for gill is geolbhach, a masculine noun (plural geolbhaigh).
Updated October 2026Report a mistake

How to say “gill” in Irish

Irish:
geolbhach
English:
gill, jaw
Word type:
noun
Gender:
masculine, first declension
Pronunciation:
“GYOL-uh-vukh”  /ˈɟɔl̪ˠəwəx/
Various forms
Plural:
geolbhaigh (gills)
Genitive singular:
geolbhaigh, an gheolbhaigh (e.g. dath an gheolbhaigh, the colour of the gill)
Genitive plural:
geolbhach, na ngeolbhach (e.g. feidhm na ngeolbhach, the function of the gills)

What does “geolbhach” mean?

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

gill
The breathing organ on the side of a fish's head.Also: fish gill, gills.
1 other meaning: jaw
2jaw
The jaw or lower part of the cheek and throat, especially when fleshy, as in a jowl or dewlap.Also: jowl, dewlap, wattle.

“Geolbhach” with the article

The plural of gill in Irish is geolbhaigh. Here is geolbhach after the article (an t-alt), in the singular and the plural.

an geolbhach
the gill
No change after an
na geolbhaigh
the gills
Plural: no change after na

“Geolbhach” in a sentence: Irish examples

Common Irish sentences using geolbhach, the Irish word for gill.

Bhí geolbhach an éisc dearg agus úr.
The fish's gill was red and fresh.
Análaíonn iasc trína gheolbhaigh.
A fish breathes through its gills.
Gearr an ceann agus na geolbhaigh den bhreac.
Cut the head and gills off the trout.
Tá dath bándearg ar na geolbhaigh.
The gills are pink in colour.
Chuaigh an duán i bhfostú sa gheolbhach.
The hook got caught in the gill.
Is féidir ocsaigin a fháil ón uisce le geolbhach.
Oxygen can be taken from water with a gill.
Bhí cuma bhreoite ar gheolbhaigh an éisc.
The fish's gills looked unhealthy.

Other nouns in Irish

More everyday Irish nouns to learn next.

Gill in Irish: frequently asked questions

What is the Irish for gill?

The Irish for gill is geolbhach (pronounced “GYOL-uh-vukh”). It’s a masculine noun and the plural is geolbhaigh. Depending on context it can also mean jaw.

How do you pronounce geolbhach in Irish?

Geolbhach is said like “GYOL-uh-vukh” (IPA /ˈɟɔl̪ˠəwəx/).

What is the plural of gill in Irish?

The plural of geolbhach is geolbhaigh; with the article, na geolbhaigh means “the gills”. The genitive plural is geolbhach, as in feidhm na ngeolbhach (the function of the gills).

Does geolbhach have more than one meaning?

Yes. Geolbhach can mean gill or jaw, depending on context; the first is the most common.

Why does geolbhach change to gheolbhach or ngeolbhach?

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

Is 'geolbhach' used for people?

Mainly it means a fish's gill, but it can also describe a fleshy jaw or jowl. For the ordinary jaw of a person 'giall' is the usual word.

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