implacable
adjective/ɪmˈplækəbl/
/ɪmˈplækəbl/
- (of strong negative opinions or feelings) that cannot be changed
- implacable hatred
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- (of a person) unwilling to stop opposing somebody/something
- an implacable enemy
- She remained implacable (= she would not change her feelings and opinions).
Word Originlate Middle English: from Latin implacabilis, from in- ‘not’ + placabilis (from placare ‘appease’).
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implacable