implacable

[im-plak-uh-buhl, -pley-kuh-]

adjective

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

   an implacable enemy.

   Synonyms: merciless, unbending, unappeasable

implacable

/ ɪmˈplækəbəl /

adjective

1. incapable of being placated or pacified; unappeasable

2. inflexible; intractable

Other Word Forms

• implacability noun
• implacableness noun
• implacably adverb

Word History and Origins

Origin of implacable¹

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

Synonym Study

See inflexible.

Example Sentences

For decades, China’s Communist Party has commissioned a steady flow of World War II books, films and television series to bolster its legitimacy, much of which casts Japan as an implacable villain.

Read more on Wall Street Journal

They – and Netanyahu – have been implacably opposed to any role for the Palestinian Authority in Gaza, and any pathway to a Palestinian State.

Read more on BBC

The most important thing to remember is that polls are not gospel truth, flawless forecasts or destiny carved in implacable stone.

Read more on Los Angeles Times

Israel remains implacably opposed and has threatened to retaliate through formal annexation of parts or all of the West Bank.

Read more on BBC

Indeed, I found myself feeling a personal bond with the calm and implacable voice guiding our progress even as my spouse spluttered and argued.

Read more on Los Angeles Times

Related Words

• inexorable 
• intractable 
• relentless 
• ruthless 
• uncompromising 
• unforgiving 
• unrelenting 
• unyielding