Synonyms of perfidious in English:

perfidious


See definition of perfidious

adjective

1‘a perfidious lover’

SYNONYMS
treacherous, duplicitous, deceitful, disloyal, faithless, unfaithful, traitorous, treasonous, false, untrue, double-dealing, dishonest, two-faced, Janus-faced, untrustworthy
rare false-hearted, double-faced, truthless, Punic
ANTONYMS

faithful, loyal