from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Of, relating to, or suggestive of a fiend; diabolical.
  • adj. Extremely wicked or cruel.
  • adj. Extremely bad, disagreeable, or difficult: a fiendish blizzard; a fiendish problem.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Sinister; evil; conniving; in the manner of a fiend.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Like a fiend; diabolically wicked or cruel; infernal; malignant; devilish; hellish.

from The Century Dictionary and Cyclopedia

  • Having the qualities of a fiend; characteristic of a fiend; demoniacal; extremely wicked, cruel, or malicious; devilish: as, a fiendish persecutor; fiendish laughter.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. extremely evil or cruel; expressive of cruelty or befitting hell


Sorry, no etymologies found.


  • It was a high-pitched laugh and if a sound ever deserved to be called fiendish that one did.

    Crime On the Coast

  • It bore an expression which might truly be called fiendish, for it gave the idea of mental power, of cruelty, of malice, of intense -- of supreme despair.

    Blackwood's Edinburgh Magazine, Volume 62, Number 385. November, 1847.

  • Remembering how white soldiers from eastern cities took the skin of a native chief for a trophy of victory, and recalling the fiendish glee of Mandanes over a victim, I can only conclude that neither race may blamelessly point the finger of reproach at the other.

    Lords of the North

  • To some of you, he'll be best known as the fiendish Lucius Malfoy from the Harry Potter films, but to me he is, in the words of David Bowie, chameleon, comedian, Corinthian and caricature.

    The Guardian World News

  • If you saw my shelf full of Elvis soundboard recordings 1969 - 77 you'd know you were in good "fiendish" company.

    his shrine

  • ANTHONY: Yes, during World War I, Franklin Roosevelt and his cousin Alice took a kind of fiendish delight in taking on as volunteers some of the assignments of the tapings, and usually it was after folks that were suspected of being German spies.

    CNN Transcript Feb 1, 2006

  • One never knew what kind of fiendish devil'try the prisoners might get up to if left too long to their own devices.

    The Chronicles of Riddick

  • Ryder looked after him, and her black eye glittered with a kind of fiendish beauty.

    The Atlantic Monthly, Volume 17, No. 103, May, 1866

  • Mrs. Bradley was grinning with a kind of fiendish blandness at Burt, whose neck was beginning to swell.

    The Saltmarsh Murders

  • And he, unaided and alone, had to meet not only the terrible charge which was laid against him, but a kind of fiendish cleverness with which that charge had been urged.

    The Day of Judgment


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