perfidious

About 0.27 uses per million words.

Meaning

1. adjective Of, pertaining to, or representing perfidy; disloyal to what should command one's fidelity or allegiance. .mw-parser-output .defdate{font-size:smaller}

Similar words

treacherous unfaithful punic tricksy wicked evil vicious slippery albion perjurious

Often followed by

and albion conduct man enemy policy as act in

Word family

perfidiously perfidiousness perfidiousnesses