perfidious

[ per-fid-ee-uhs ]
/ pərˈfɪd i əs /
SEE SYNONYMS FOR perfidious ON THESAURUS.COM

adjective

deliberately faithless; treacherous; deceitful: a perfidious lover.

Origin of perfidious

First recorded in 1590–1600, perfidious is from the Latin word perfidiōsus faithless, dishonest. See perfidy, -ous

OTHER WORDS FROM perfidious

Words nearby perfidious

perfectly, perfecto, perfector, perfector press, perfervid, perfidious, perfidy, perfin, perfing, perfoliate, perfoliate bellwort

Words related to perfidious

deceitful, deceptive, double-dealing, faithless, insidious, misleading, recreant, shifty, slick, traitorous, two-faced, two-timing, undependable, unfaithful, unreliable, untrustworthy, false, unloyal

Example sentences from the Web for perfidious

British Dictionary definitions for perfidious

perfidious
/ (pəˈfɪdɪəs) /

adjective

guilty, treacherous, or faithless; deceitful

Derived forms of perfidious

perfidiously, adverb perfidiousness, noun