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Knock in Irish (Cnag): Meaning, Pronunciation, Usage

‘cnag’ also means: crack · lump · to knock

The Irish for knock is cnag, a masculine noun (plural cnaga).
Updated October 2026Report a mistake

How to say “knock” in Irish

Irish:
cnag
English:
knock, crack, lump
Word type:
noun
Gender:
masculine, first declension
Pronunciation:
“knag”  /kn̪ˠaɡ/
Various forms
Plural:
cnaga (knocks)
Genitive singular:
cnaig, an chnaig (e.g. fuaim an chnaig, the sound of the knock)
Genitive plural:
cnag, na gcnag (e.g. fuaim na gcnag, the sound of the knocks)

What does “cnag” mean?

“Cnag” has three alternative meanings. The most common comes first.

knock
A sharp blow or rap, for example on a door or on the head.Also: rap, blow, tap.
2 other meanings: crack or lump
2crack
A sharp cracking or crunching sound, such as something breaking.Also: crunch, snap.
3lump
A small hard lump or knob, such as a bump on the head or a knot in wood.Also: knob, bump, knot.

Other Irish words for knock: cnagadh (knocking), cnag (knock)

Other entries for “cnag”

The same spelling has its own page as:

“Cnag” with the article

The plural of knock in Irish is cnaga. Here is cnag after the article (an t-alt), in the singular and the plural.

an cnag
the knock
No change after an
na cnaga
the knocks
Plural: no change after na

“Cnag” in a sentence: Irish examples

Common Irish sentences using cnag, the Irish word for knock.

Chuala mé cnag ar an doras.
I heard a knock at the door.
Bhuail sé cnag ar an mbord.
He rapped on the table.
Thug sí cnag sa cheann dó.
She gave him a knock on the head.
Bhí an cnag chomh hard sin gur dhúisigh mé.
The knock was so loud that I woke up.
Níor fhreagair aon duine na cnaga.
Nobody answered the knocks.
Tá cnag mór ar mo cheann.
I have a big lump on my head.
Chualamar cnag nuair a bhris an chraobh.
We heard a crack when the branch broke.

Other nouns in Irish

More everyday Irish nouns to learn next.

Knock in Irish: frequently asked questions

What is the Irish for knock?

The Irish for knock is cnag (pronounced “knag”). It’s a masculine noun and the plural is cnaga. Depending on context it can also mean crack or lump.

How do you pronounce cnag in Irish?

Cnag is said like “knag” (IPA /kn̪ˠaɡ/).

What is the plural of knock in Irish?

The plural of cnag is cnaga; with the article, na cnaga means “the knocks”. The genitive plural is cnag, as in fuaim na gcnag (the sound of the knocks).

Does cnag have more than one meaning?

Yes. Cnag can mean knock, crack or lump, depending on context; the first is the most common. Cnag also has its own entry as a verb meaning to knock.

Why does cnag change to chnag or gcnag?

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

How do I say someone knocked on the door?

Use 'bhuail sé cnag ar an doras', or the verb directly: 'chnag sé ar an doras'.

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