[im-plak-uh-buhl, -pley-kuh-]


not to be appeased, mollified, or pacified; inexorable: an implacable enemy.

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

Synonyms for implacable Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for implacability

Historical Examples of implacability

  • 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



incapable of being placated or pacified; unappeasable
inflexible; intractable
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).



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.

Online Etymology Dictionary, © 2010 Douglas Harper