radical; acute; sharp
尖鋭な批評が文学界に波紋を広げた。
Sharp criticism sent ripples through the literary world.
両者の対立は尖鋭化する一方だった。
The conflict between the two sides only grew more acute.
尖鋭な視点で社会問題を分析した論文だ。
It is a paper that analyzes social issues from a sharp perspective.