perfidious

The British, who ruled Palestine under a League of Nations mandate, were particularly perfidious.

The American Spectator proclaimed: “It is unlikely Republicans shall soon forget your perfidious betrayal.”

Only then can they happily resume their perfidious business as usual.

The suspense with which Louis listened to this perfidious confederation, was almost insufferable.

He was Honour's self, till he brought the serpent to his bosom, in the shape of his perfidious son.

Perfidious Carnegie shrank from the task, having recently proclaimed the gospel of good will and harmony.

The artifice of his perfidious secretary was discovered and punished.

She had reached the perfidious age when a woman's beauty, like a full-blown rose, fades in a day.