Word of the Day

: July 13, 2026

implacable

play
adjective im-PLAK-uh-bul

What It Means

Someone or something described as implacable is not capable of being appeased or changed.

// The project faced implacable resistance from community members, and is now off the table.

See the entry >

implacable in Context

“Unlike, say, the globetrotting stories of Ian Fleming or John le Carré, in which victories only temporarily frustrate an implacable foe, [Agatha] Christie’s smaller worlds feel put right when the cover closes or credits roll.” — The Economist, 17 Jan. 2026


Did You Know?

Implacable is rooted in the Latin verb placare, meaning “to soothe,” but its im- prefix is a variant of the negating prefix in- (as in inactive) and it signals that there’s nothing warm and fuzzy here. Someone or something described as implacable cannot be soothed, which usually means trouble: implacable is most often attached to words like foe, enemy, hatred and hostility. The opposite of implacable is, of course, placable; it means “easily soothed,” but sadly isn’t called upon very often. Another placare word is likely more familiar. Placate means “to soothe or appease”; it’s frequently applied when an angry person is made to feel less so.



Test Your Vocabulary

Unscramble the letters to form an adjective meaning “submissive to the restraint or command of authority”: TIBODEEN

VIEW THE ANSWER

Podcast


More Words of the Day

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!