treachery

[ trech-uh-ree ]
/ ˈtrɛtʃ ə ri /

noun, plural treach·er·ies.

violation of faith; betrayal of trust; treason.
an act of perfidy, faithlessness, or treason.

Origin of treachery

1175–1225; Middle English trecherie < Middle French, Old French, equivalent to trech(ier) to deceive + -erie -ery

synonym study for treachery

1. See disloyalty.

Example sentences from the Web for treachery

British Dictionary definitions for treachery

treachery
/ (ˈtrɛtʃərɪ) /

noun plural -eries

the act or an instance of wilful betrayal
the disposition to betray

Word Origin for treachery

C13: from Old French trecherie, from trechier to cheat; compare trick