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Synonyms

implacable

American  
[im-plak-uh-buhl, -pley-kuh-] / ɪmˈplæk ə bəl, -ˈpleɪ kə- /

adjective

  1. not to be appeased, mollified, or pacified; inexorable.

    an implacable enemy.

    Synonyms:
    merciless, unbending, unappeasable

implacable British  
/ ɪmˈplækəbəl /

adjective

  1. incapable of being placated or pacified; unappeasable

  2. inflexible; intractable

"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

Synonym Usage

See inflexible.

Other Word Forms

Etymology

Origin of implacable

First recorded in 1375–1425; late Middle English word from Latin word implācābilis. See im- 2, placable

Explanation

An implacable person just can’t be appeased. If you really offended your best friend and tried every kind of apology but she refused to speak to you again, you could describe her as implacable. Implacable is derived from the verb to placate, which means to soothe, or to appease. If you’re babysitting and the kid starts screaming the moment that his parents leave the house, and nothing you give him, be it a toy or ice cream, can calm him down, he might seem implacable. But try the TV. It tends to turn screaming kids into silent, happy zombies.

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Vocabulary lists containing implacable

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Implacable gargantuans like Facebook will continue to war with it.

From The Wall Street Journal • Sep. 24, 2016

Implacable Resolution: The increasingly familiar chin-up, narrow-eyed Mussolini frown.

From The New Yorker • Aug. 12, 2015

Implacable, dangerous foes to be sure - but, again, existing even though the U.S. is already militarily dominant.

From Washington Times • Mar. 24, 2015

Implacable Susan Bickley sings the housekeeper Mrs Grose, Giselle Allen chills as the ghostly Miss Jessel and lovely Joanna Songi reprises her role as knowing, not-so-little Flora.

From The Guardian • Aug. 13, 2011

Implacable toward each other they surely were, but so long as their feelings weren't delaying their sailing days, that was their own business.

From Sonnie-Boy's People by Connolly, James B. (James Brendan)

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