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[feen-dish] /ˈfin dɪʃ/
diabolically cruel and wicked.
Origin of fiendish
1520-30; fiend + -ish1
Related forms
fiendishly, adverb
fiendishness, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for fiendish
Contemporary Examples
Historical Examples
  • Two eyes near the door were gleaming with the light of fiendish triumph.

  • No wonder he is sometimes provoked to fiendish outbursts of wrath.

  • But the behaviour of the faithful animal, instead of stirring them to compassion, only adds to their fiendish mirth.

    The Death Shot Mayne Reid
  • All that fiendish cruelty and the demon of destruction could do was done.

    The Roof of France Matilda Betham-Edwards
  • Up I sprang, fist at shoulder, and lunged at that fiendish visage with all the power of my body.

    A Maid of the Kentucky Hills Edwin Carlile Litsey
  • This language is wanton cruelty,—it is fiendish insult,—is it not, Evelyn?

    Alice, or The Mysteries, Complete Edward Bulwer-Lytton
  • No, Clara is fiendish when I have been drinking, I will not meet her.

    Little Wolf M. A. Cornelius
British Dictionary definitions for fiendish


of or like a fiend
diabolically wicked or cruel
(informal) extremely difficult or unpleasant: a fiendish problem
Derived Forms
fiendishly, adverb
fiendishness, 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 fiendish

1520s, from fiend + -ish. Related: Fiendishly; fiendishness.

Online Etymology Dictionary, © 2010 Douglas Harper
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