perfidy

Deliberate breach of faith; calculated violation of trust; treachery.

The act or an instance of treachery.

Breach of faith or trust; base treachery; faithlessness.

Synonyms See perfidious.

The act of violating faith or allegiance; violation of a promise or vow, or of trust reposed; faithlessness; treachery.

A state or act of violating faith or allegiance; violation of a promise or vow, or of trust reposed; faithlessness; treachery.

Specifically, in warfare, an illegitimate act of deception, such as using symbols like the Red Cross or white flag to gain proximity to an enemy for purposes of attack.

A state or act of deceit.

an act of deliberate betrayal

betrayal of a trust