Implacable definition

ĭm-plăkə-bəl, -plākə-
(rare) That cannot be eased, lessened, or allayed.
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Impossible to placate or appease.

Implacable foes; implacable suspicion.

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Not placable; that cannot be appeased or pacified; relentless; inexorable.
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The definition of implacable is someone or something who cannot be calmed or made less angry.

An example of implacable is a screaming child who won't listen to reason.

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Not able to be placated or appeased.
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Origin of implacable

  • Middle English from Old French from Latin implācābilis in- not in–1 plācābilis placable placable

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Old French implacable, from Latin implācābilis

    From Wiktionary