Definition
to end someone's life
杀掉某人
The plot of the movie was so thrilling that in the end, the protagonist polished off the villain, which was shocking.
电影的情节非常刺激，最后主角杀掉了反派，令人震惊。
He didn't want anyone to interfere with his plans, so he decided to polish off his enemies one by one.
他不想任何人干扰他的计划，所以决定一个个杀掉他的敌人。
During the battle, his soldiers eventually succeeded in polishing off the enemy troops.
在战斗中，他的士兵最终成功杀掉了敌军。