Dictionary

treachery

treachery

noun treach·ery \-rē\

: harmful things that are done usually secretly to a friend, your own country, etc.

: an act of harming someone who trusts you

plural treach·er·ies

Full Definition of TREACHERY

1
:  violation of allegiance or of faith and confidence :  treason
2
:  an act of perfidy or treason

Examples of TREACHERY

  1. a tale of treachery and revenge
  2. <was furious that she revealed his secret and never forgave her for the treachery>

Origin of TREACHERY

Middle English trecherie, from Anglo-French, from trecher, tricher to deceive, from Vulgar Latin *triccare — more at trick
First Known Use: 13th century

Rhymes with TREACHERY

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