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Treachery in Irish (Fealltóireacht): Meaning, Pronunciation, Usage

The Irish for treachery is fealltóireacht, a feminine noun.
Updated October 2026Report a mistake

How to say “treachery” in Irish

Irish:
fealltóireacht
English:
treachery
Word type:
noun
Gender:
feminine
Pronunciation:
“FYOWL-toe-ir-akht”  /ˈfʲaul̪ˠt̪ˠoːɾʲəxt̪ˠ/
Various forms
Genitive singular:
fealltóireachta, na fealltóireachta (e.g. gníomh fealltóireachta, an act of treachery)

What does “fealltóireacht” mean?

treachery
The act or practice of betraying someone who trusted you, especially betraying your country or cause.Also: treason, betrayal, perfidy, disloyalty.

Other Irish words for treachery: feall (treachery)

“Fealltóireacht” with the article

Here is fealltóireacht after the article (an t-alt).

an fhealltóireacht
the treachery
Lenition: f becomes fh after an (feminine noun)

“Fealltóireacht” in a sentence: Irish examples

Common Irish sentences using fealltóireacht, the Irish word for treachery.

Ní mhaithfidh sé an fhealltóireacht sin go deo.
He will never forgive that treachery.
Cúisíodh é i bhfealltóireacht in aghaidh an stáit.
He was accused of treason against the state.
Ba ghníomh fealltóireachta é sin, gan amhras.
That was an act of treachery, without doubt.
Is fuath liom fealltóireacht de chineál ar bith.
I hate treachery of any kind.
Bhí fealltóireacht i gceist nuair a chaill siad an cath.
Treachery was involved when they lost the battle.
Cuireadh chun báis é mar gheall ar fhealltóireacht.
He was executed for treason.
Is iomaí scéal fealltóireachta atá sa stair.
There are many stories of treachery in history.

Other nouns in Irish

More everyday Irish nouns to learn next.

Treachery in Irish: frequently asked questions

What is the Irish for treachery?

The Irish for treachery is fealltóireacht (pronounced “FYOWL-toe-ir-akht”). It’s a feminine noun.

How do you pronounce fealltóireacht in Irish?

Fealltóireacht is said like “FYOWL-toe-ir-akht” (IPA /ˈfʲaul̪ˠt̪ˠoːɾʲəxt̪ˠ/).

Does fealltóireacht have a plural?

No plural form is given for fealltóireacht in the standard. Many abstract and mass nouns in Irish have no plural.

Why does fealltóireacht change to fhealltóireacht or bhfealltóireacht?

Irish changes the start of some words after certain words. After mo (my) fealltóireacht becomes m'fhealltóireacht (lenition), and after ár (our) or i (in) it becomes ár bhfealltóireacht (eclipsis).

What is the difference between fealltóireacht and tréas?

Fealltóireacht is treachery or betrayal in general, from fealltóir, a traitor, while tréas is the more legal term for treason against the state.

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