invader/ɪn'veɪdər $ -dər/

n. a soldier, country or army that enters another country in order to take control by military force

n. [C] 侵略者：a foreign invader 外国侵略者

◇He devoted his life to fighting against the invaders. 他把自己的生命献给了抗击侵略者的事业中。

构词invade + -er