Meaning of “treachery” in the English Dictionary

american-english dictionary

"treachery" in British English

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treacherynoun [ U ]

uk /ˈtretʃ.ər.i/ us /ˈtretʃ.ɚ.i/ formal

behaviour that deceives or is not loyal to someone who trusts you:

From his cell on board ship, the captain wrote about the treachery of his crew.

(Definition of “treachery” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"treachery" in American English

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treacherynoun [ U ]

us /ˈtretʃ·ə·ri/

things that are done to deceive someone who trusts you:

a play about treachery and betrayal

(Definition of “treachery” from the Cambridge Academic Content Dictionary © Cambridge University Press)