betrayer

UK:^*^*UK and possibly other pronunciationsUK and possibly other pronunciations/bɪˈtreɪə^r/

be•tray /bɪˈtreɪ/USA pronunciation v. [~ + object]

to deliver or expose to an enemy by treachery:[~ + object (+ to + object)]Benedict Arnold tried to betray his country to the enemy.
to be unfaithful or disloyal to: to betray one's friends.
to reveal or make known (a secret given in confidence):to betray a plan.
to reveal unconsciously (something a person would prefer to hide):The nervousness on her face betrays her insecurity.
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]

be•tray (bi trā′),USA pronunciation v.t.

to deliver or expose to an enemy by treachery or disloyalty:Benedict Arnold betrayed his country.
to be unfaithful in guarding, maintaining, or fulfilling:to betray a trust.
to disappoint the hopes or expectations of;
be disloyal to:to betray one's friends.
to reveal or disclose in violation of confidence:to betray a secret.
to reveal unconsciously (something one would preferably conceal):Her nervousness betrays her insecurity.
to show or exhibit;
reveal;
disclose:an unfeeling remark that betrays his lack of concern.
to deceive, misguide, or corrupt:a young lawyer betrayed by political ambitions into irreparable folly.
to seduce and desert.

be•tray′al, n.
be•tray′er, n.

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