Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of perfidious is as below...

False-hearted :: False-hearted (a.) Hollow or unsound at the core; treacherous; deceitful; perfidious.

Perfidiousness :: Perfidiousness (n.) The quality of being perfidious; perfidy.

Falsely :: Falsely (adv.) In a false manner; erroneously; not truly; perfidiously or treacherously.

Traitorous :: Traitorous (a.) Guilty of treason; treacherous; perfidious; faithless; as, a traitorous officer or subject..

True :: True (n.) Steady in adhering to friends, to promises, to a prince, or the like; unwavering; faithful; loyal; not false, fickle, or perfidious; as, a true friend; a wife true to her husband; an officer true to his charge..

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

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

Faithless :: Faithless (a.) Not true to allegiance, duty, or vows; perfidious; trecherous; disloyal; not of true fidelity; inconstant, as a husband or a wife..

Treachery :: Treachery (n.) Violation of allegiance or of faith and confidence; treasonable or perfidious conduct; perfidy; treason.

Disleal :: Disleal (a.) Disloyal; perfidious.

Felonious :: Felonious (a.) Having the quality of felony; malignant; malicious; villainous; traitorous; perfidious; in a legal sense, done with intent to commit a crime; as, felonious homicide..

Proditorious :: Proditorious (a.) Treacherous; perfidious; traitorous.

False :: False (superl.) Not faithful or loyal, as to obligations, allegiance, vows, etc.; untrue; treacherous; perfidious; as, a false friend, lover, or subject; false to promises..

Treacherous :: Treacherous (a.) Like a traitor; involving treachery; violating allegiance or faith pledged; traitorous to the state or sovereign; perfidious in private life; betraying a trust; faithless.

Perfidiously :: Perfidiously (adv.) In a perfidious manner.

Unfaithful :: Unfaithful (a.) Not faithful; not observant of promises, vows, allegiance, or duty; violating trust or confidence; treacherous; perfidious; as, an unfaithful subject; an unfaithful agent or servant..

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