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Noun: betrayer  bi'trey-u(r)
  1. One who reveals confidential information to the police or other authority
    "The mafia liquidated the betrayer";
    - informer, rat [informal], squealer, blabber [informal]
  2. A person who says one thing and does another
    - double-crosser, double-dealer, two-timer, traitor

Derived forms: betrayers

Type of: beguiler, cheat, cheater, deceiver, informant, slicker [informal], source, trickster

Encyclopedia: Betrayer