implacable
- Not able to be placated or appeased.
- Impossible to prevent or stop; inexorable, unrelenting, unstoppable.
- Adamant; immovable.
Opposite of
appeasable, assuageable, pacable, pacifiable, placable
Frequency
Pronounced as (IPA)
/ɪmˈplækəb(ə)l/
Etymology
In summary
From Middle English implācāble (“immitigable, unappeasable”) from Old French implacable (“harsh, unrelenting; implacable”) (modern French implacable), from Latin implācābilis (“unappeasable, implacable; irreconcilable”), from im- (variant of in- (prefix meaning ‘not’)) + plācābilis (“placable; appeasing, moderating, pacifying, propitiating; acceptable”) (from plācō (“to assuage, pacify, placate; to appease; to reconcile”) + -bilis (suffix forming adjectives indicating a capacity or worth of being acted upon)).
deadly
cruel and heartless
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