ETYM Old Eng. trecherďe, trichere, Old Fren. trecherie, tricherie, French tricherie trickery, from tricher to cheat, to trick, Old Fren. trichier, trechier; probably of Teutonic origin. Related to Trickery, Trick.
An act of deliberate betrayal; SYN. betrayal, treason, perfidy.