Implacable
hardNegative toneim-PLAK-uh-bul
adjective
Definition
unable to be appeased or pacified; relentless
Memory hook
IMPLACABLE = 'IM (not) + PLACATE': you cannot PLACATE this person; their anger cannot be calmed.
Word roots
Learning roots unlocks whole word families. Study common GRE root words.
Examples
“She faced an implacable enemy who refused every offer of peace.”
“His implacable hatred had hardened over many years.”
Test yourself
Fill in the blank with the right word:
“She faced an ______ enemy who refused every offer of peace.”
Show answer
implacable
Synonyms
Antonyms
Categories
GRE Tip
Implacable is a hard-difficulty GRE word. On the GRE, you might see it paired with synonyms like "unappeasable" or "relentless" in Sentence Equivalence questions. Look for contrast clues (however, despite, although) that signal the opposite meaning. Words like "appeasable".
Related GRE Words
capitulate
To surrender or give in, often after resisting
conciliatory
intended to placate or win goodwill; appeasing
equanimity
mental calmness and composure, especially under stress
foment
to stir up or instigate (trouble, unrest)
impassive
showing no emotion or expression
imperturbable
unable to be upset or agitated; calm
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