oppressor /əˈprɛsə/

• 1. 

  N-COUNT An oppressor is a person or group of people that is treating another person or group of people cruelly or unfairly. 压迫者 [oft with poss]

  例：

  Lacking leadership, they could organize no defence against their oppressors.

  没有人领导，他们就无法组织起来反抗压迫者。