extremist

極端主義者、激進份子

The attack was carried out by a small group of extremists.

這起攻擊是由一小群極端主義者所策劃的。

極端主義的、激進的、偏激的

He was expelled from the party for his extremist views.

他因為抱持偏激的主張而被逐出該政黨。