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Moss in Irish (Caonach): Meaning, Pronunciation, Usage

‘caonach’ also means: mildew

The Irish for moss is caonach, a masculine noun (plural caonaigh).
Updated October 2026Report a mistake

How to say “moss” in Irish

Irish:
caonach
English:
moss, mildew
Word type:
noun
Gender:
masculine, first declension
Pronunciation:
“KAY-nukh”  /ˈkeːnˠəx/
Various forms
Plural:
caonaigh (mosses)
Genitive singular:
caonaigh, an chaonaigh (e.g. dath an chaonaigh, the colour of the moss)
Genitive plural:
caonach, na gcaonach (e.g. fás na gcaonach, the growth of the mosses)

What does “caonach” mean?

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

moss
A small soft green plant that grows in thick mats on stones, trees and damp ground.Also: mosses.
1 other meaning: mildew
2mildew
A fuzzy mould or mildew that grows on damp or decaying things.Also: mould, mold.

“Caonach” with the article

The plural of moss in Irish is caonaigh. Here is caonach after the article (an t-alt), in the singular and the plural.

an caonach
the moss
No change after an
na caonaigh
the mosses
Plural: no change after na

“Caonach” in a sentence: Irish examples

Common Irish sentences using caonach, the Irish word for moss.

Tá caonach ag fás ar an mballa.
Moss is growing on the wall.
Bhí an caonach bog faoinár gcosa.
The moss was soft under our feet.
Bhain sé an caonach den díon.
He removed the moss from the roof.
Bhí caonach ar na crainn sa choill.
There was moss on the trees in the wood.
Fásann caonaigh éagsúla sa phortach.
Various mosses grow in the bog.
Tá an chloch clúdaithe le caonach.
The stone is covered in moss.
Tá an fhaiche lán de chaonach i mbliana.
The lawn is full of moss this year.

Other nouns in Irish

More everyday Irish nouns to learn next.

Moss in Irish: frequently asked questions

What is the Irish for moss?

The Irish for moss is caonach (pronounced “KAY-nukh”). It’s a masculine noun and the plural is caonaigh. Depending on context it can also mean mildew.

How do you pronounce caonach in Irish?

Caonach is said like “KAY-nukh” (IPA /ˈkeːnˠəx/).

What is the plural of moss in Irish?

The plural of caonach is caonaigh; with the article, na caonaigh means “the mosses”. The genitive plural is caonach, as in fás na gcaonach (the growth of the mosses).

Does caonach have more than one meaning?

Yes. Caonach can mean moss or mildew, depending on context; the first is the most common.

Why does caonach change to chaonach or gcaonach?

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

Is there a proverb with 'caonach'?

Yes: 'Ní chruinníonn cloch reatha caonach', a rolling stone gathers no moss.

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