noun
utter villain; atrocious fiend; devil
Strongly negative term for a person of extreme evil; often used in dramatic or literary contexts.
彼は極重悪人として歴史に名を残した。
He went down in history as an utter villain.
その物語の極重悪人は、読者に強い嫌悪感を抱かせる。
The atrocious fiend in that story evokes strong disgust in readers.
Compound of 極 (extreme), 重 (heavy/severe), and 悪人 (villain). The exact historical derivation is uncertain, but the combination intensifies the notion of a deeply evil person.