To disenfranchise a group of people means to take away their right to vote, or their right to vote for what they really want.
例句
...fears of an organized attempt to disenfranchise supporters of Father Aristide.对剥夺阿里斯蒂德神父支持者选举权这一有组织企图的担心...the helplessness of disenfranchised minorities.被剥夺了选举权的少数民族的无助
英汉词典释义
vt.
剥夺…的选举权,剥夺…的公民权,终止…的特许权
White supremacists devise new methods to disenfranchise Negroes.白人至上论者想出新的方法以剥夺黑人的公民权。