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Noun: betrayal  bi'trey-ul
  1. Aiding an enemy against the interest of one's country
  2. An act of deliberate betrayal
    - treachery, treason, perfidy
  3. The quality of being disloyal
    - disloyalty

Derived forms: betrayals

Type of: dishonesty, infidelity, knavery, subversiveness, traitorousness, treason, unfaithfulness

Encyclopedia: Betrayal, Justice, Revenge