ˈpərfədē, ˈpə̄f-, ˈpəif-, -di noun
( -es )
Etymology: Latin perfidia, from perfidus faithless, dishonest (from per- deviating from + fides faith) + -ia -y
1. : the quality or state of being dishonest or disloyal : deceit , treachery
such obvious liars that their perfidy palled after it ceased to be amusing — W.A.White
the name of Judas has become a byword of covetousness and perfidy — Samuel Cox
2. : an act or instance of deception or betrayal
tirades of a slighted lover against the beloved object's perfidies — C.E.Montague