Synonyms for (adjective) perfidious

Synonyms: treacherous, perfidious, punic

Definition: tending to betray; especially having a treacherous character as attributed to the Carthaginians by the Romans

Usage: Punic faith; the perfidious Judas; the fiercest and most treacherous of foes; treacherous intrigues

Similar words: unfaithful

Definition: not true to duty or obligation or promises

Usage: an unfaithful lover