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[uhn-mur-si-fuh l] /ʌnˈmɜr sɪ fəl/
merciless; relentless; severe; cruel; pitiless.
unsparingly great, extreme, or excessive, as amounts:
to talk for an unmerciful length of time.
Origin of unmerciful
First recorded in 1475-85; un-1 + merciful
Related forms
unmercifully, adverb
unmercifulness, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for unmercifully
Historical Examples
  • It was received with great applause, and I was unmercifully chaffed.

    Brighter Britain! (Volume 1 of 2) William Delisle Hay
  • They were swarming all over us, and how unmercifully they did guy us!

    War from the Inside

    Frederick L. (Frederick Lyman) Hitchcock
  • His whole weight hangs in them—they'll cut him unmercifully.

    Disowned Victor Endersby
  • It was no easy task, the full pails tugging most unmercifully at his arms.

    Paul Prescott's Charge Horatio Alger
  • You are just the kind of a man that women fool most unmercifully.

  • They then stripped him naked, bound him with cords, and beat him most unmercifully with cudgels.

  • So, bantering each other unmercifully, they reached the front door.

    The Free Range

    Francis William Sullivan
  • You have most disgracefully and unmercifully pulled an Uncle's whiskers.'

    The Magic Pudding Norman Lindsay
  • Time will never be a match for him, for he beats him most unmercifully.

    The Violin George Hart
  • When she was a child, they beat her unmercifully because she refused to beg.

    Which? Ernest Daudet
British Dictionary definitions for unmercifully


showing no mercy; relentless
extreme or excessive
Derived Forms
unmercifully, adverb
unmercifulness, 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 unmercifully



late 15c., from un- (1) "not" + merciful. Related: Unmercifully.

Online Etymology Dictionary, © 2010 Douglas Harper
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