UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/bɪˈtreɪəl/US:USA pronuncation: IPAUSA pronuncation: IPA/bɪˈtreɪəl/

WordReference Random House Learner's Dictionary of American English © 2020
be•tray•al /bɪˈtreɪəl/USA pronunciation   n. 
  1. [uncountable] betraying or being betrayed:At that point we feared betrayal more than anything else.
  2. an act of betraying or being betrayed:[countable]When he failed to support her, she took it as a betrayal.

WordReference Random House Learner's Dictionary of American English © 2020
be•tray /bɪˈtreɪ/USA pronunciation   v. [+ object]
  1. to deliver or expose to an enemy by treachery:[+ object (+ to + object)]Benedict Arnold tried to betray his country to the enemy.
  2. to be unfaithful or disloyal to: to betray one's friends.
  3. to reveal or make known (a secret given in confidence):to betray a plan.
  4. to reveal unconsciously (something a person would prefer to hide):The nervousness on her face betrays her insecurity.
  5. to be unfaithful to (someone) by having sexual relations with someone else:He vowed never to betray his wife again.
be•tray•er, n. [countable]

WordReference Random House Unabridged Dictionary of American English © 2020
be•tray  (bi trā),USA pronunciation v.t. 
  1. to deliver or expose to an enemy by treachery or disloyalty:Benedict Arnold betrayed his country.
  2. to be unfaithful in guarding, maintaining, or fulfilling:to betray a trust.
  3. to disappoint the hopes or expectations of;
    be disloyal to:to betray one's friends.
  4. to reveal or disclose in violation of confidence:to betray a secret.
  5. to reveal unconsciously (something one would preferably conceal):Her nervousness betrays her insecurity.
  6. to show or exhibit;
    disclose:an unfeeling remark that betrays his lack of concern.
  7. to deceive, misguide, or corrupt:a young lawyer betrayed by political ambitions into irreparable folly.
  8. to seduce and desert.
be•trayal, n. 
be•trayer, n. 
  • Latin trādere to betray. See traitor
  • Old French trair
  • Middle English bitraien, equivalent. to bi- be- + traien 1200–50
    • 4.See corresponding entry in Unabridged bare, expose, tell, divulge.
    • 6.See corresponding entry in Unabridged display, manifest, expose, uncover.
    • 4, 6.See corresponding entry in Unabridged hide, conceal.

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