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Thin in Irish (caol): Meaning, Forms, Examples

Other uses of ‘caol’: narrow · slender (of a vowel or consonant) · weak · narrows (noun, masculine)

The Irish for thin is caol: bóthar caol, a thin road.
Updated October 2026Report a mistake

How to say “thin” in Irish

Irish:
caol
English:
thin, narrow, slender (of a vowel or consonant), weak
Word type:
adjective
Thinner:
níos caoile
Thinnest:
is caoile
Plural:
caola
Pronunciation:
“kweel”  /kiːlˠ/

What does “caol” mean?

“Caol” has four alternative meanings. The most common comes first.

thin
Slim or slender in shape or build.Also: slender, slim, slight.
3 other meanings: narrow or slender (of a vowel or consonant) or weak
2narrow
Not wide; having little width.Also: tight.
3slender (of a vowel or consonant)
In grammar, describes the vowels e and i and the consonants next to them.Also: slender, palatalized.
4weak
Watered down or diluted, as of a drink.Also: diluted, thin.

Other Irish adjectives for thin: tanaí (thin)

Other entries for “caol”

The same spelling has its own page as:

“Caol” after a noun

An Irish adjective comes after its noun. Here is caol after bóthar (road, masculine), after sráid (street, feminine) and after a plural.

after a masculine nounbóthar caola thin road
after a feminine nounsráid chaola thin street
after a plural nounbóithre caolathin roads

séimhiú (the h) the ending

feminine
sráidstreet
+
caolthin
=
sráid chaola thin street

After a feminine noun the adjective gets a séimhiú, an h after its first letter: sráid chaol. After a masculine noun it stays as it is: bóthar caol.

plural
bóithreroads
+
caolathin, plural
=
bóithre caolathin roads

With a plural noun the adjective takes its plural form, caola. It also gets an h after a plural that ends in a slender consonant; after other plurals it does not: sráideanna caola.

Thinner, thinnest, very thin

níosmore
+
caoilethin
=
níos caoilethinner
ismost
+
caoilethin
=
is caoilethinnest

Tá an droichead seo níos caoile ná an ceann eile. This bridge is narrower than the other one.

thinnerníos caoilein the past tense: ní ba chaoile
thinnestis caoilein the past tense: ba chaoile
as thin aschomh caol leno change after chomh
very thinan-chaolan- lenites, except d, t and s
too thinróchaolró- lenites

“Caol” in a sentence: Irish examples

With a masculine noun, a feminine noun, a plural, a comparison and on its own.

Shiúlamar síos bóthar caol sa sliabh.
We walked down a narrow road in the mountains.
Tá sráid chaol taobh thiar den séipéal.
There is a narrow street behind the church.
Bhí lámha caola fada aici.
She had long slender hands.
Tá an droichead seo níos caoile ná an ceann eile.
This bridge is narrower than the other one.
Tá sé an-chaol anois.
He is very thin now.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Thin in Irish: frequently asked questions

What is the Irish for thin?

The Irish for thin is caol (pronounced “kweel”). It comes after the noun: bóthar caol, a thin road; sráid chaol, a thin street.

How do you say thinner and thinnest in Irish?

níos caoile is thinner and is caoile is thinnest. In the past tense they become ní ba chaoile and ba chaoile.

Why does caol become chaol?

After a feminine singular noun an adjective is lenited: it gets an h after its first letter. So sráid chaol (a thin street) but bóthar caol (a thin road), because bóthar is masculine.

What is the plural of caol?

With a plural noun caol becomes caola: bóithre caola, sráideanna caola.

How do you say very thin in Irish?

an-chaol. Too thin is róchaol, and as thin as is chomh caol le.

Does caol have more than one meaning?

Yes. Caol can mean thin, narrow, slender (of a vowel or consonant) or weak, depending on context; the first is the most common.

What is the difference between caol and tanaí?

Both can mean thin, but caol stresses slenderness or narrowness (bóthar caol), while tanaí often means thin or shallow (uisce tanaí, páipéar tanaí).

What does caol díreach mean?

Caol díreach means straight or directly, as in chuaigh sé caol díreach abhaile, he went straight home.

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