energumen
/ˌenɜːˈgjuːmen/noun
- archaic a person believed to be possessed by the devil or a spirit〈古〉恶魔（或鬼魂）附身的人, 着魔的人。
词源
early 18th cent. (also denoting an enthusiast or fanatic)： via late Latin from Greek energoumenos, passive participle of energein 'work in or upon'.