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Traitor in Irish (Tréatúir): Meaning, Pronunciation, Usage

The Irish for traitor is tréatúir, a masculine noun (plural tréatúirí).
Updated October 2026Report a mistake

How to say “traitor” in Irish

Irish:
tréatúir
English:
traitor
Word type:
noun
Gender:
masculine, third declension
Pronunciation:
“TRAY-too-ir”  /ˈtʲɾʲeːt̪ˠuːɾʲ/
Various forms
Plural:
tréatúirí (traitors)
Genitive singular:
tréatúra, an tréatúra (e.g. ainm an tréatúra, the traitor's name)
Genitive plural:
tréatúirí, na dtréatúirí (e.g. liosta na dtréatúirí, the list of traitors)

What does “tréatúir” mean?

traitor
A person who betrays their country, cause or friends.Also: betrayer, turncoat, treacherous person.

Other Irish words for traitor: fealltóir (traitor)

“Tréatúir” with the article

The plural of traitor in Irish is tréatúirí. Here is tréatúir after the article (an t-alt), in the singular and the plural.

an tréatúir
the traitor
No change after an
na tréatúirí
the traitors
Plural: no change after na

“Tréatúir” in a sentence: Irish examples

Common Irish sentences using tréatúir, the Irish word for traitor.

Tréatúir a bhí ann, gan amhras.
He was a traitor, no doubt about it.
Gabhadh an tréatúir ag an teorainn.
The traitor was caught at the border.
Níor maitheadh feall an tréatúra riamh.
The traitor's treachery was never forgiven.
Thug siad tréatúirí ar na hoifigigh sin.
They called those officers traitors.
Ná glaoigh tréatúir orm!
Don't call me a traitor!
Bhí tréatúir i measc na gcomrádaithe.
There was a traitor among the comrades.
Cuireadh na tréatúirí chun báis.
The traitors were put to death.

Other nouns in Irish

More everyday Irish nouns to learn next.

Traitor in Irish: frequently asked questions

What is the Irish for traitor?

The Irish for traitor is tréatúir (pronounced “TRAY-too-ir”). It’s a masculine noun and the plural is tréatúirí.

How do you pronounce tréatúir in Irish?

Tréatúir is said like “TRAY-too-ir” (IPA /ˈtʲɾʲeːt̪ˠuːɾʲ/).

What is the plural of traitor in Irish?

The plural of tréatúir is tréatúirí; with the article, na tréatúirí means “the traitors”. The genitive plural is tréatúirí, as in liosta na dtréatúirí (the list of traitors).

Why does tréatúir change to thréatúir or dtréatúir?

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

What is the difference between 'tréatúir' and 'fealltóir'?

Both mean traitor; 'tréatúir' suggests treason against a country or cause (linked to 'tréas'), while 'fealltóir' is a more general word for a treacherous or deceitful person.

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