Treachery

/ˈtrɛtʃ.ər.i/

Meaning & Definition

noun

The betrayal of trust; an act of deliberate betrayal or deception.

His treachery was revealed when he leaked sensitive information to the enemy.

Deceitful or untrustworthy behavior.

The treachery of his closest allies left him isolated and vulnerable.

A violation of allegiance or faithfulness.

The history books are filled with stories of treachery during times of war.

A specific act of treachery or betrayal.

The treachery he committed against his family was unforgivable.

Middle English trecherie, from Old French trecherie, from trecher 'to betray'.

acts of treachery

deeds that involve betrayal or disloyalty.

a treacherous heart

a person who is deceitful and untrustworthy.

treachery in politics

betrayal or dishonest behavior within political contexts.

traitor

A person who betrays a friend, country, principle, etc.

perfidy

Deceitfulness; untrustworthiness.

duplicitous

Deceitful, especially by pretending one set of feelings and acting under the influence of another.

Backstabbing

He's known for backstabbing his colleagues to get ahead.

Two-faced

I can't believe she's being two-faced after everything we've been through.