implacable
UK: ɪmˈplækəb(ə)l | US: ɪmˈplækəb(ə)l
adj. unable to be appeased or pacified; relentless
adj. (of a feeling or condition) impossible to change or overcome
implacable = im<not> + plac<please> + able<capable of>
- im (prefix): From Latin in- (not), negating the root.
- plac (root): From Latin placare (to calm, please), related to placid and placate.
- able (suffix): From Latin -abilis (capable of), indicating capacity or tendency.
Etymology Origin:
The word implacable traces back to Latin implacabilis, combining in- (not) + placabilis (easily calmed). The root plac- reflects the Indo-European idea of "flatness" or "smoothness," metaphorically extended to emotional calmness. Over time, implacable evolved in English (14th century) to describe unyielding hostility or conditions resistant to change, preserving its Latin logic of "incapable of being pleased."
The dictator was implacable in his pursuit of power.
Her implacable anger surprised everyone at the meeting.
Climate change poses an implacable threat to coastal cities.
Despite negotiations, their demands remained implacable.
The judge’s implacable stance left no room for appeal.