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Perfidious vs Fallacious - What's the difference?

perfidious | fallacious |

As adjectives the difference between perfidious and fallacious

is that perfidious is of, pertaining to, or representing perfidy; disloyal to what should command one's fidelity or allegiance while fallacious is characterized by fallacy; false or mistaken.

perfidious

English

Adjective

(en adjective)
  • Of, pertaining to, or representing perfidy; disloyal to what should command one's fidelity or allegiance.
  • * 1610 , , act 2 scene 2
  • *:TRINCULO (speaking about ): By this light, a most perfidious and drunken / monster: when his god's asleep, he'll rob his bottle.
  • * 1851 , , Dr. Goldsmith's History of Rome (ed. William C. Taylor), ch. 26:
  • The perfidious Ricimer soon became dissatisfied with Anthe'mius, and raised the standard of revolt.
  • * 1905 , , John Knox and the Reformation , ch. 14:
  • [S]he knew Huntly for the ambitious traitor he was, a man peculiarly perfidious and self-seeking.
  • * 2005 June 21, , " Art: The Velocipede of Modernism," Time :
  • When the Nazis branded Feininger a "degenerate artist" in 1937, he left 54 paintings for safekeeping with a Bauhaus friend named Hermann Klumpp. After the war, and for the rest of Feininger's life, the perfidious Klumpp refused to give them back.

    Synonyms

    * (disloyal) disloyal, traitorous, treacherous, unfaithful

    Derived terms

    * perfidiously * perfidiousness

    fallacious

    English

    Adjective

    (en adjective)
  • Characterized by fallacy; false or mistaken.
  • Deceptive or misleading.
  • Usage notes

    * Nouns often used with "fallacious": argument, reasoning, etc.

    See also

    * wrong * incorrect * illogical * deceiving * deceitful * misleading * delusive * illusive * illusory * erroneous * faulty * specious