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Thinner in Irish (Caolaitheoir): Meaning, Pronunciation, Usage

The Irish for thinner is caolaitheoir, a masculine noun (plural caolaitheoirí).
Updated October 2026Report a mistake

How to say “thinner” in Irish

Irish:
caolaitheoir
English:
thinner
Word type:
noun
Gender:
masculine, third declension
Pronunciation:
“KWEEL-ee-hoh-ir”  /ˈkiːlʲiˌhoːɾʲ/
Various forms
Plural:
caolaitheoirí (thinners)
Genitive singular:
caolaitheora, an chaolaitheora (e.g. buidéal caolaitheora, a bottle of thinner)
Genitive plural:
caolaitheoirí, na gcaolaitheoirí (e.g. úsáid na gcaolaitheoirí, the use of thinners)

What does “caolaitheoir” mean?

thinner
A liquid such as turpentine or solvent added to paint or varnish to make it thinner.Also: paint thinner, diluent, solvent.

“Caolaitheoir” with the article

The plural of thinner in Irish is caolaitheoirí. Here is caolaitheoir after the article (an t-alt), in the singular and the plural.

an caolaitheoir
the thinner
No change after an
na caolaitheoirí
the thinners
Plural: no change after na

“Caolaitheoir” in a sentence: Irish examples

Common Irish sentences using caolaitheoir, the Irish word for thinner.

Cuir beagán caolaitheora leis an bpéint.
Add a little thinner to the paint.
Tá an caolaitheoir sa gharáiste.
The thinner is in the garage.
Ghlan mé na scuaba le caolaitheoir.
I cleaned the brushes with thinner.
Tá boladh láidir ón gcaolaitheoir sin.
That thinner has a strong smell.
Díoltar caolaitheoirí éagsúla sa siopa crua-earraí.
Various thinners are sold in the hardware shop.
Coinnigh an caolaitheoir ó pháistí.
Keep the thinner away from children.
Doirt mé an caolaitheoir i bpróca beag.
I poured the thinner into a small jar.

Other nouns in Irish

More everyday Irish nouns to learn next.

Thinner in Irish: frequently asked questions

What is the Irish for thinner?

The Irish for thinner is caolaitheoir (pronounced “KWEEL-ee-hoh-ir”). It’s a masculine noun and the plural is caolaitheoirí.

How do you pronounce caolaitheoir in Irish?

Caolaitheoir is said like “KWEEL-ee-hoh-ir” (IPA /ˈkiːlʲiˌhoːɾʲ/).

What is the plural of thinner in Irish?

The plural of caolaitheoir is caolaitheoirí; with the article, na caolaitheoirí means “the thinners”. The genitive plural is caolaitheoirí, as in úsáid na gcaolaitheoirí (the use of thinners).

Why does caolaitheoir change to chaolaitheoir or gcaolaitheoir?

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

What verb is caolaitheoir related to?

It comes from the verb caolaigh, to thin or dilute, with the agent ending -eoir, so a caolaitheoir is something that thins.

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