Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Impossible to placate or appease.

from The Century Dictionary.

  • Not placable; not to be appeased; not to be pacified or reconciled; inexorable: as, an implacable prince; implacable malice.
  • Not to be relieved or assuaged.
  • Synonyms Relentless, etc. (see inexorable), unappeasable, unforgiving, vindictive, pitiless, rancorous.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective Not placable; not to be appeased; incapable of being pacified; inexorable.
  • adjective rare Incapable of being relieved or assuaged; inextinguishable.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Not able to be placated or appeased.
  • adjective Adamant; immovable.

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

  • adjective incapable of being placated

Etymologies

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

[Middle English, from Old French, from Latin implācābilis : in-, not; see in– + plācābilis, placable; see placable.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

im- +‎ placable

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Examples

  • So implacable is his revenge that he sends a party of soldiers into Egypt, some hundreds of miles, and they bring him back by force of arms.

    Commentary on the Whole Bible Volume IV (Isaiah to Malachi) 1721

  • Allegra’s tone was neutral, her expression implacable.

    The Home for Broken Hearts Rowan Coleman 2010

  • “Well, that’s as may be, Lady Nell, but it’s not right,” Linton declared, her arms folded, her expression implacable.

    A Wicked Gentleman Jane Feather 2007

  • “Well, that’s as may be, Lady Nell, but it’s not right,” Linton declared, her arms folded, her expression implacable.

    A Wicked Gentleman Jane Feather 2007

  • Rue Murillo, or in the tent at Croisset; he has recalled the implacable didactics of his old master, his tender brutality, the paternal advice of his generous and candid heart.

    Guy de Maupassant, a study 2003

  • Rue Murillo, or in the tent at Croisset; he has recalled the implacable didactics of his old master, his tender brutality, the paternal advice of his generous and candid heart.

    Une Vie 2003

  • The doctrine is optimistic; and whoever has a generous faith in humanity will have no fault to find with the absence of the idea of implacable evil from its teaching.

    Kokoro Japanese Inner Life Hints Lafcadio Hearn 1877

  • Rather, "Unless haply Thou hast utterly rejected us, and art beyond measure wroth against us," that is, Unless Thou art implacable, which is impossible, hear our prayer [Calvin].

    Commentary Critical and Explanatory on the Whole Bible 1871

  • Murillo, or in the tent at Croisset; he has recalled the implacable didactics of his old master, his tender brutality, the paternal advice of his generous and candid heart.

    Complete Original Short Stories of Guy De Maupassant Guy de Maupassant 1871

  • Murillo, or in the tent at Croisset; he has recalled the implacable didactics of his old master, his tender brutality, the paternal advice of his generous and candid heart.

    Original Short Stories — Volume 01 Guy de Maupassant 1871

Comments

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  • adjective: incapable of making less angry or hostile

    Win or lose, the coach was always implacable, never giving the athletes an easy practice or a break.

    October 19, 2016