betrayer

betray

[bih-trey]
verb (used with object)
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; reveal; 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.

Origin:
1200–50; Middle English bitraien, equivalent to bi- be- + traien < Old French trair < Latin trādere to betray. See traitor

betrayal, noun
betrayer, noun
prebetray, verb (used with object)
prebetrayal, noun
self-betrayal, noun
self-betraying, adjective
unbetrayed, adjective
unbetraying, adjective


4. bare, expose, tell, divulge. 6. display, manifest, expose, uncover.


4, 6. hide, conceal.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
betray (bɪˈtreɪ)
 
vb
1.  to aid an enemy of (one's nation, friend, etc); be a traitor to: to betray one's country
2.  to hand over or expose (one's nation, friend, etc) treacherously to an enemy
3.  to disclose (a secret, confidence, etc) treacherously
4.  to break (a promise) or be disloyal to (a person's trust)
5.  to disappoint the expectations of; fail: his tired legs betrayed him
6.  to show signs of; indicate: if one taps china, the sound betrays any faults
7.  to reveal unintentionally: his grin betrayed his satisfaction
8.  betray oneself to reveal one's true character, intentions, etc
9.  to lead astray; deceive
10.  euphemistic to seduce and then forsake (a woman)
 
[C13: from be- + trayen from Old French trair, from Latin trādere]
 
be'trayal
 
n
 
be'trayer
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

betray
late 13c., bitrayen "mislead, deceive, betray," from M.E. be- + O.Fr. traine "betrayal, deception, deceit," from trair (Mod.Fr. trahir) "betray, deceive," from L. tradere "hand over," from trans- "across" + dare "to give" (see date (1)).
Online Etymology Dictionary, © 2010 Douglas Harper
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