Dictionary.com
Thesaurus.com
Showing results for implacable. Search instead for displaceable.
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

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.

I felt sickened by every piece of news I gave her—her court date canceled, the border closed, the pandemic spreading—but her faith in the system, and in me, seemed implacable.

From Slate • Jan. 15, 2026

After taking office, Cheney pursued with implacable vigor his vision of sweeping presidential authority—an idea known as the unitary executive.

From The Wall Street Journal • Nov. 4, 2025

Craig Wallace’s Telégin, known as “Waffles” for his pockmarked skin, is an amiable fumbler yet suffused with kindness and possessing an implacable decency.

From Los Angeles Times • Mar. 19, 2025

"Even the implacable Logan Roy would smile in delighted amazement if he could see this," Fiona Mountford of iNews wrote of Snook's stage performance.

From BBC • Feb. 16, 2024

What really counted was the possibility of escape, a leap to freedom, out of the implacable ritual, a wild run for it that would give whatever chance for hope there was.

From "The Stranger" by Albert Camus