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  1. Dictionary
    perfidious
    /pəˈfɪdɪəs/

    adjective

    • 1. deceitful and untrustworthy: literary "a perfidious lover"

    More definitions, origin and scrabble points

  2. The meaning of PERFIDIOUS is of, relating to, or characterized by perfidy. How to use perfidious in a sentence. Did you know? Synonym Discussion of Perfidious.

  3. adjective. literary uk / pəˈfɪd.i.əs / us / pɚˈfɪd.i.əs / Add to word list. unable to be trusted, or showing no loyalty: She described the new criminal bill as a perfidious attack on democracy. Synonym. treacherous. SMART Vocabulary: related words and phrases. Disloyalty, betrayal & treason. adulterous. backstabber. betrayal. betrayer.

  4. adjective. literary us / pɚˈfɪd.i.əs / uk / pəˈfɪd.i.əs / Add to word list Add to word list. unable to be trusted, or showing no loyalty: She described the new criminal bill as a perfidious attack on democracy. Synonym. treacherous. SMART Vocabulary: related words and phrases. Disloyalty, betrayal & treason. adulterous. backstabber. betrayal.

  5. Synonyms for PERFIDIOUS: traitorous, false, treacherous, unreliable, disloyal, faithless, unfaithful, untrue; Antonyms of PERFIDIOUS: true, faithful, constant, loyal, devout, steadfast, responsible, staunch.

  6. Perfidious definition: deliberately faithless; treacherous; deceitful. See examples of PERFIDIOUS used in a sentence.

  7. If someone accuses you of being perfidious, you should probably be offended — it means underhanded, treacherous, deceitfuleven evil. If you betray people often, you're perfidious: traitors are extremely perfidious.

  8. If you describe someone as perfidious, you mean that they have betrayed someone or cannot be trusted. [ literary ] Their feet will trample on the dead bodies of their perfidious aggressors.

  9. adjective. Not true to duty or obligation: disloyal, faithless, false, false-hearted, recreant, traitorous, treacherous, unfaithful, untrue. The American Heritage® Roget's Thesaurus.

  10. : the quality or state of being faithless or disloyal : treachery. 2. : an act or an instance of disloyalty. Synonyms. disloyalty. faithlessness. falseness. falsity. inconstancy. infidelity. perfidiousness. unfaithfulness. See all Synonyms & Antonyms in Thesaurus. Examples of perfidy in a Sentence.

  11. Jun 14, 2024 · perfidious (comparative more perfidious, superlative most perfidious) Of, pertaining to, or representing perfidy; disloyal to what should command one's fidelity or allegiance. [from late 16th c.]