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perfidious
  • – adjective: Of, relating to, or marked by perfidy; treacherous. See Synonyms at faithless.
  •    from Wiktionary, Creative Commons Attribution/Share-Alike License
  • – adjective: Of, pertaining to, or representing perfidy; disloyal to what should command one's fidelity or allegiance.
  •    from the GNU version of the Collaborative International Dictionary of English
  • – adjective: Guilty of perfidy; violating good faith or vows; false to trust or confidence reposed; teacherous; faithless. (Usage:   a perfidious friend)
  • – adjective: Involving, or characterized by, perfidy.
  •    from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
  • – adjective: tending to betray; especially having a treacherous character as attributed to the Carthaginians by the Romans (Usage:   the perfidious Judas)
  •    from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
  • –   Then Miriam was furious, and complained to Minna about what she called her perfidious conduct; but Minna only laughed, and told her she could have Petrofsky instead. "
  •    John Thorndyke's Cases related by Christopher Jervis and edited by R. Austin Freeman, 1902, provided by wordnik
  • –   We wouldn't lie to you about the history of "perfidious" -- even though the word itself suggests deceitfulness.
  •    Merriam-Webster's Word of the Day, 2010, provided by spinner
  • –   If soldiers are entitled to deal harshly with wounded enemy soldiers who might be engaged in perfidious acts, surely that entitlement cant be contingent on holding a mini-trial right there to determine the matter.
  •    The Volokh Conspiracy » Phil Carter responds:, 2004, provided by wordnik
  • –   'Your nation have well been called perfidious, Major Counsellor.
  •    A Modern Mercenary, 1899, provided by wordnik
  • –   From the end of 1796 the Venetian Senate secretly continued its armaments, and the whole conduct of that Government announced intentions which have been called perfidious, but the only object of which was to defeat intentions still more perfidious.
  •    The Memoirs of Napoleon, 1836, provided by wordnik
  • –   Jews and Judaism are characterized as the perfidious enemy of Islam and Israel becomes the Salmon Rushdie of the nations
  •    Conservapedia - Recent changes [en], 2010, provided by spinner
  • –   - where Jews and Judaism are characterized as the perfidious enemy of Islam, and Israel becomes the Salmon Rushdie of the nations.
  •    Conservapedia - Recent changes [en], 2010, provided by spinner
  • –   In truth, that prayer, which, in its first wording defined the Jews as "perfidious", that is "outside the faith" and blind, had already been "changed" but never abolished by John XXIII.
  •    Archive 2009-01-01, 2009, provided by wordnik