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Beast in Irish (Béist): Meaning, Pronunciation, Usage

‘béist’ also means: brute

The Irish for beast is béist, a feminine noun (plural béisteanna).
Updated October 2026Report a mistake

How to say “beast” in Irish

Irish:
béist
English:
beast, brute
Word type:
noun
Gender:
feminine
Pronunciation:
“baysht”  /bʲeːʃtʲ/
Various forms
Plural:
béisteanna (beasts)
Genitive singular:
béiste, na béiste (e.g. fiacla na béiste, the beast's teeth)
Genitive plural:
béisteanna, na mbéisteanna (e.g. scéalta na mbéisteanna, the stories of the beasts)

What does “béist” mean?

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

beast
A large wild or fearsome animal, or a monster.Also: monster, creature, brute.
1 other meaning: brute
2brute
A rough, cruel or coarse person, used as an insult.Also: beast of a person, savage.

Other Irish words for beast: ainmhí (animal), beithíoch (beast), arracht (monster), brúid (brute)

“Béist” with the article

The plural of beast in Irish is béisteanna. Here is béist after the article (an t-alt), in the singular and the plural.

an bhéist
the beast
Lenition: b becomes bh after an (feminine noun)
na béisteanna
the beasts
Plural: no change after na

“Béist” in a sentence: Irish examples

Common Irish sentences using béist, the Irish word for beast.

Chonaic sé béist mhór sa loch.
He saw a huge beast in the lake.
Bhí an bhéist ag teacht amach as an uaimh.
The beast was coming out of the cave.
Mharaigh an laoch an bhéist le claíomh.
The hero killed the beast with a sword.
Bhí eagla orainn roimh scread na béiste.
We were afraid of the beast's scream.
Tá go leor béisteanna sna seanscéalta.
There are lots of monsters in the old stories.
Ná bí i do bhéist leis an bpáiste sin.
Don't be a brute to that child.
Deirtear go bhfuil béist i bhfolach i Loch Nis.
They say a monster is hiding in Loch Ness.

Other nouns in Irish

More everyday Irish nouns to learn next.

Beast in Irish: frequently asked questions

What is the Irish for beast?

The Irish for beast is béist (pronounced “baysht”). It’s a feminine noun and the plural is béisteanna. Depending on context it can also mean brute.

How do you pronounce béist in Irish?

Béist is said like “baysht” (IPA /bʲeːʃtʲ/).

What is the plural of beast in Irish?

The plural of béist is béisteanna; with the article, na béisteanna means “the beasts”. The genitive plural is béisteanna, as in scéalta na mbéisteanna (the stories of the beasts).

Does béist have more than one meaning?

Yes. Béist can mean beast or brute, depending on context; the first is the most common.

Why does béist change to bhéist or mbéist?

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

What is the difference between béist and péist?

Béist usually means a beast or monster, while péist is a worm, though péist can also mean a monster as in ollphéist.

What is a 'béist dhubh'?

Béist dhubh, literally 'black beast', is a traditional name for the otter, more commonly called madra uisce or dobharchú.

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