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Gearwheel in Irish (Giar-roth): Meaning, Pronunciation, Usage

The Irish for gearwheel is giar-roth, a masculine noun (plural giar-rothaí).
Updated October 2026Report a mistake

How to say “gearwheel” in Irish

Irish:
giar-roth
English:
gearwheel
Word type:
noun
Gender:
masculine
Pronunciation:
“GEER-roh”  /ˈɟiəɾˌɾˠɔh/
Various forms
Plural:
giar-rothaí (gearwheels)
Genitive singular:
giar-rotha, an ghiar-rotha (e.g. fiacla an ghiar-rotha, the teeth of the gearwheel)
Genitive plural:
giar-rothaí, na ngiar-rothaí (e.g. córas na ngiar-rothaí, the gearwheel system)

What does “giar-roth” mean?

gearwheel
A wheel with teeth around its edge that turns another toothed wheel in a machine.Also: gear wheel, cogwheel, gear, toothed wheel.

Other Irish words for gearwheel: giar (gear)

“Giar-roth” with the article

The plural of gearwheel in Irish is giar-rothaí. Here is giar-roth after the article (an t-alt), in the singular and the plural.

an giar-roth
the gearwheel
No change after an
na giar-rothaí
the gearwheels
Plural: no change after na

“Giar-roth” in a sentence: Irish examples

Common Irish sentences using giar-roth, the Irish word for gearwheel.

Tá giar-roth briste sa chlog.
There is a broken gearwheel in the clock.
Chas an giar-roth go mall.
The gearwheel turned slowly.
Caitheadh fiacail den ghiar-roth.
A tooth wore off the gearwheel.
Tá na giar-rothaí ag casadh le chéile.
The gearwheels are turning together.
Ní mór méid an ghiar-rotha a thomhas.
The size of the gearwheel must be measured.
Chuir sé ola ar na giar-rothaí.
He oiled the gearwheels.
Tá giar-rothaí beaga i m'uaireadóir.
There are small gearwheels in my watch.

Other nouns in Irish

More everyday Irish nouns to learn next.

Gearwheel in Irish: frequently asked questions

What is the Irish for gearwheel?

The Irish for gearwheel is giar-roth (pronounced “GEER-roh”). It’s a masculine noun and the plural is giar-rothaí.

How do you pronounce giar-roth in Irish?

Giar-roth is said like “GEER-roh” (IPA /ˈɟiəɾˌɾˠɔh/).

What is the plural of gearwheel in Irish?

The plural of giar-roth is giar-rothaí; with the article, na giar-rothaí means “the gearwheels”. The genitive plural is giar-rothaí, as in córas na ngiar-rothaí (the gearwheel system).

Why does giar-roth change to ghiar-roth or ngiar-roth?

Irish changes the start of some words after certain words. After mo (my) giar-roth becomes mo ghiar-roth (lenition), and after ár (our) or i (in) it becomes ár ngiar-roth (eclipsis).

What is the difference between 'giar' and 'giar-roth'?

'Giar' is a gear in general, such as a car gear, while 'giar-roth' is specifically the toothed wheel itself.

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