Perfidious meaning

pər-fĭd'ē-əs
The definition of perfidious is someone or something that cannot be trusted or that is dishonest.

A person who lies all the time is an example of someone who would be described as perfidious.

adjective
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Of, relating to, or marked by perfidy; treacherous.
adjective
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Of, pertaining to, or representing perfidy; disloyal to what should command one's fidelity or allegiance.
adjective
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Characterized by perfidy; treacherous.
adjective
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Origin of perfidious

  • 1590s, from Latin perfidiosus "treacherous," from perfidia
    From Wiktionary