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[feyth-lis] /ˈfeɪθ lɪs/
not adhering to allegiance, promises, vows, or duty:
the faithless behavior of Benedict Arnold.
not trustworthy; unreliable.
without trust or belief.
being without religious faith.
(among Christians) bereft of Christian faith.
Origin of faithless
First recorded in 1250-1300, faithless is from the Middle English word faithles. See faith, -less
Related forms
faithlessly, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for faithless
Historical Examples
  • That this or that good woman could do this or that faithless or mean thing, was nothing to her!

    Weighed and Wanting George MacDonald
  • Now they tell you, and seem to show you, that he is faithless.

    Fair Margaret H. Rider Haggard
  • Have I not, in the height of them, vowed revenge upon the faithless charmer?

    Clarissa, Volume 3 (of 9) Samuel Richardson
  • Where have you learned the disingenuous and faithless arts you employ?

    Imogen William Godwin
  • Not once since she began to get better, had Phemy alluded to her faithless lover.

    Heather and Snow George MacDonald
  • She realized how she would have felt if her husband, her "man," had ever been faithless to her.

    A Spirit in Prison Robert Hichens
  • How can woman be so faithless, so treacherous––in my heart I cried.

    The Book of Khalid Ameen Rihani
  • Shall you send back the portrait to your faithless mistress?

    The Memoires of Casanova, Complete Jacques Casanova de Seingalt
  • faithless man, why did you not let me cure you six weeks ago.

    The Memoires of Casanova, Complete Jacques Casanova de Seingalt
  • But Nemesis, swift and sudden, awaits the faithless Euphues.

    John Lyly John Dover Wilson
British Dictionary definitions for faithless


unreliable or treacherous
dishonest or disloyal
having no faith or trust
lacking faith, esp religious faith
Derived Forms
faithlessly, adverb
faithlessness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for faithless

c.1300, "unbelieving," from faith + -less. Meaning "insincere" is mid-14c. Related: Faithlessly; faithlessness.

Online Etymology Dictionary, © 2010 Douglas Harper
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