potent
adjective uk/ˈpəʊ.tənt/ us/ˈpoʊ.t̬ənt/
强有力的，强大的；有效力的
very powerful, forceful, or effective
Surprise remains the terrorists' most potent weapon. 突袭仍是恐怖分子最强有力的武器。
The Berlin Wall was a potent symbol of the Cold War. 柏林墙是冷战的有力象征。
This is a very potent drug and can have unpleasant side-effects. 该药效力很强，副作用也不小。