n. 25B6; noun BETRAYAL, disloyalty, faithlessness, unfaithfulness, infidelity, breach of trust, duplicity, deceit, deception, stab in the back, back-stabbing, double-dealing, untrustworthiness; treason; informal two-timing; poetic/literary perfidy.
TREACHERY
Meaning of TREACHERY in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012