Synonyms

implacable

American

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

adjective

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

an implacable enemy.

Synonyms:

merciless, unbending, unappeasable

implacable British

/ ɪmˈplækəbəl /

adjective

incapable of being placated or pacified; unappeasable
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

Related Words

See inflexible.

Other Word Forms

implacability noun
implacableness noun
implacably adverb

Etymology

Origin of implacable

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

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.

Most were gray-haired, faces lined with time and learning: they looked stately, implacable.

From Literature

The Ayatollah was implacably anti-American, and the revolutionaries stormed the U.S.

From The Wall Street Journal

But many, including the incoming Archbishop of Canterbury, remain implacably opposed.

From BBC

But in its immensity, its implacable absoluteness, is a certain confusion between means and ends.

From The Wall Street Journal

“The real evils in war,” St. Augustine once wrote, are “love of violence, revengeful cruelty, fierce and implacable enmity, wild resistance, and the lust of power.”

From The Wall Street Journal

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023