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Killer in Irish (Marfóir): Meaning, Pronunciation, Usage

The Irish for killer is marfóir, a masculine noun (plural marfóirí).
Updated October 2026Report a mistake

How to say “killer” in Irish

Irish:
marfóir
English:
killer
Word type:
noun
Gender:
masculine, third declension
Pronunciation:
“MAR-fohr”  /ˈmˠaɾˠfˠoːɾʲ/
Various forms
Plural:
marfóirí (killers)
Genitive singular:
marfóra, an mharfóra (e.g. ainm an mharfóra, the killer's name)
Genitive plural:
marfóirí, na marfóirí (e.g. ainmneacha na marfóirí, the killers' names)

What does “marfóir” mean?

killer
A person or thing that kills.Also: slayer, murderer.

Other Irish words for killer: dúnmharfóir (murderer), murdaróir (murderer)

“Marfóir” with the article

The plural of killer in Irish is marfóirí. Here is marfóir after the article (an t-alt), in the singular and the plural.

an marfóir
the killer
No change after an
na marfóirí
the killers
Plural: no change after na

“Marfóir” in a sentence: Irish examples

Common Irish sentences using marfóir, the Irish word for killer.

Níor gabhadh an marfóir go fóill.
The killer hasn't been caught yet.
Bhí na gardaí ar thóir an mharfóra.
The police were hunting the killer.
Is marfóir é an t-ocras.
Hunger is a killer.
Cuireadh an bheirt mharfóirí i bpríosún.
The two killers were put in prison.
Chonaic sí aghaidh an mharfóra sa scannán.
She saw the killer's face in the film.
Bhí scéal faoin marfóir sna nuachtáin inné.
There was a story about the killer in the papers yesterday.
Ní raibh aon trua ag an marfóir.
The killer had no pity.

Other nouns in Irish

More everyday Irish nouns to learn next.

Killer in Irish: frequently asked questions

What is the Irish for killer?

The Irish for killer is marfóir (pronounced “MAR-fohr”). It’s a masculine noun and the plural is marfóirí.

How do you pronounce marfóir in Irish?

Marfóir is said like “MAR-fohr” (IPA /ˈmˠaɾˠfˠoːɾʲ/).

What is the plural of killer in Irish?

The plural of marfóir is marfóirí; with the article, na marfóirí means “the killers”. The genitive plural is marfóirí, as in ainmneacha na marfóirí (the killers' names).

Why does marfóir change to mharfóir?

After words like mo (my) and do (your) the first letter is lenited: mo mharfóir. After ár (our) it stays ár marfóir, because m does not take eclipsis.

What is the difference between marfóir and dúnmharfóir?

Marfóir is any killer, person or thing, while dúnmharfóir specifically means a murderer, someone who kills unlawfully.

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