Bible Dictionaries
Perfidious

Webster's Dictionary

(1):

(a.) Involving, or characterized by, perfidy.

(2):

(a.) Guilty of perfidy; violating good faith or vows; false to trust or confidence reposed; teacherous; faithless; as, a perfidious friend.

Bibliography Information
Webster, Noah. Entry for 'Perfidious'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​p/perfidious.html. 1828.