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Definition of treachery:

  1. Violation of allegiance or of faith and confidence; treasonable or perfidious conduct; perfidy; treason.


subversiveness, cheat, imposition, swindle, imposture, double cross, falsity, business, perfidiousness, unfaithfulness, lese majesty, perfidy, sellout, false-heartedness, a stab in the back, cheating, trust, betrayal, treason, artifice, deception, disaffection, swindling, faithlessness, continue, trick, disloyalty, deceit, inconstancy, fraud, duplicity, disconnect, infidelity, falseness, treacherousness, backstabbing, two-timing, disloyalty, high treason.

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