treachery

UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈtrɛtʃəri/US:USA pronunciation: IPA and respellingUSA pronuncation: IPA/ˈtrɛtʃəri/ ,USA pronunciation: respelling(trechə rē)

Inflections of 'treachery' (nnoun: Refers to person, place, thing, quality, etc.): nplplural noun: Noun always used in plural form--for example, "jeans," "scissors.": treacheries

WordReference Random House Learner's Dictionary of American English © 2020
treach•er•y /ˈtrɛtʃəri/USA pronunciation   n., pl.  -er•ies. 
  1. betrayal of trust;
    treason:[uncountable]"The treachery of mankind is proverbial'' means that you can expect people to betray others.
  2. [countable] an act of treason.

WordReference Random House Unabridged Dictionary of American English © 2020
treach•er•y  (trechə rē),USA pronunciation n., pl.  -er•ies. 
  1. violation of faith;
    betrayal of trust;
    treason.
  2. an act of perfidy, faithlessness, or treason.
  • Middle French, Old French, equivalent. to trech(ier) to deceive + -erie -ery
  • Middle English trecherie 1175–1225
    • 1.See corresponding entry in Unabridged See disloyalty.
    • 1.See corresponding entry in Unabridged loyalty.

Collins Concise English Dictionary © HarperCollins Publishers::
treachery /ˈtrɛtʃərɪ/ n ( pl -eries)
  1. the act or an instance of wilful betrayal
  2. the disposition to betray
Etymology: 13th Century: from Old French trecherie, from trechier to cheat; compare trick
'treachery' also found in these entries (note: many are not synonyms or translations):
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