• synonyms


[im-plak-uh-buhl, -pley-kuh-]
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  1. not to be appeased, mollified, or pacified; inexorable: an implacable enemy.
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Origin of implacable

First recorded in 1375–1425; late Middle English word from Latin word implācābilis. See im-2, placable
Related formsim·plac·a·bil·i·ty, im·plac·a·ble·ness, nounim·plac·a·bly, adverb


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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for implacability

Historical Examples

  • Yet Dunstan's first interview with his father had not had all this quality of implacability.

    Under the Law

    Edwina Stanton Babcock

  • It was not enough to soften the implacability of their landlord.

    Ormond, Volume I (of 3)

    Charles Brockden Brown

  • His power is incalculable and his implacability is absolute.


    Charles Neville Buck

  • And now I have added to her troubles that fancy that I was obdurate in my anger and implacability.'

    Stray Pearls

    Charlotte M. Yonge

  • Sulphurous rage, in gusts or in lasting tempests, rising from a fund of just implacability, is inevitable.

British Dictionary definitions for implacability


  1. incapable of being placated or pacified; unappeasable
  2. inflexible; intractable
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Derived Formsimplacability or implacableness, nounimplacably, adverb
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

Word Origin and History for implacability


1530s, from Late Latin implacabilitas, from Latin implacabilis (see implacable).

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early 15c., from Old French implacable, from Latin implacabilis "unappeasable," from assimilated form of in- "not, opposite of" (see in- (1)) + placabilis "easily appeased" (see placate). Related: Implacably.

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Online Etymology Dictionary, © 2010 Douglas Harper