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Attacker in Irish (Ionsaitheoir): Meaning, Pronunciation, Usage

‘ionsaitheoir’ also means: aggressor

The Irish for attacker is ionsaitheoir, a masculine noun (plural ionsaitheoirí).
Updated October 2026Report a mistake

How to say “attacker” in Irish

Irish:
ionsaitheoir
English:
attacker, aggressor
Word type:
noun
Gender:
masculine, third declension
Pronunciation:
“UN-see-hor”  /ˈʊn̪ˠsˠiːhoːɾʲ/
Various forms
Plural:
ionsaitheoirí (attackers)
Genitive singular:
ionsaitheora, an ionsaitheora (e.g. ainm an ionsaitheora, the attacker's name)
Genitive plural:
ionsaitheoirí, na n-ionsaitheoirí (e.g. líon na n-ionsaitheoirí, the number of attackers)

What does “ionsaitheoir” mean?

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

attacker
A person who attacks or assaults someone or something.Also: assailant, aggressor, raider.
1 other meaning: aggressor
2aggressor
A person or country that starts a fight or war by attacking first.Also: invader, attacking side.

“Ionsaitheoir” with the article

The plural of attacker in Irish is ionsaitheoirí. Here is ionsaitheoir after the article (an t-alt), in the singular and the plural.

an t-ionsaitheoir
the attacker
Masculine nouns take t before a vowel after an
na hionsaitheoirí
the attackers
Plural: na adds h before a vowel

“Ionsaitheoir” in a sentence: Irish examples

Common Irish sentences using ionsaitheoir, the Irish word for attacker.

Theith an t-ionsaitheoir ón áit.
The attacker fled the scene.
Ní fhaca sí aghaidh an ionsaitheora.
She didn't see the attacker's face.
Ghabh na gardaí beirt ionsaitheoirí aréir.
The police arrested two attackers last night.
Bhí an t-ionsaitheoir ag caitheamh hata dubh.
The attacker was wearing a black hat.
Throid sé ar ais in aghaidh a ionsaitheora.
He fought back against his attacker.
Cuireadh an milleán ar an ionsaitheoir.
The blame was put on the aggressor.
Tá na hionsaitheoirí fós ar a dteitheadh.
The attackers are still on the run.

Other nouns in Irish

More everyday Irish nouns to learn next.

Attacker in Irish: frequently asked questions

What is the Irish for attacker?

The Irish for attacker is ionsaitheoir (pronounced “UN-see-hor”). It’s a masculine noun and the plural is ionsaitheoirí. Depending on context it can also mean aggressor.

How do you pronounce ionsaitheoir in Irish?

Ionsaitheoir is said like “UN-see-hor” (IPA /ˈʊn̪ˠsˠiːhoːɾʲ/).

What is the plural of attacker in Irish?

The plural of ionsaitheoir is ionsaitheoirí; with the article, na hionsaitheoirí means “the attackers”. The genitive plural is ionsaitheoirí, as in líon na n-ionsaitheoirí (the number of attackers).

Does ionsaitheoir have more than one meaning?

Yes. Ionsaitheoir can mean attacker or aggressor, depending on context; the first is the most common.

Why does ionsaitheoir sometimes have a t or h in front of it?

Irish nouns beginning with a vowel take a prefix after certain words: an t-ionsaitheoir (the attacker), a hionsaitheoir (her attacker), a n-ionsaitheoir (their attacker), na hionsaitheoirí (the attackers).

How is 'ionsaitheoir' related to 'ionsaí'?

'Ionsaí' means an attack, and 'ionsaitheoir' is the person who makes the attack, formed from the verb 'ionsaigh' (to attack).

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