Extremely wicked or heinous; used to describe actions or people that are exceptionally cruel or atrocious.
あの事件は極悪な手口で行われた。
That incident was carried out in a heinous manner.
極悪な犯罪者として知られている。
He is known as an extremely vicious criminal.
彼の行為は極悪非道だと非難された。
His actions were condemned as atrocious and inhumane.