implacable

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

adjective

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

OTHER WORDS FROM implacable

im·plac·a·bil·i·ty, im·plac·a·ble·ness, nounim·plac·a·bly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for implacable

British Dictionary definitions for implacable

implacable
/ (ɪmˈplækəbəl) /

adjective

incapable of being placated or pacified; unappeasable
inflexible; intractable

Derived forms of implacable

implacability 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