opponent
/əˈpəunənt; ə`ponənt/ n
(a) ~ (at/in sth) person who is against another person in a fight, a struggle, a game or an argument 对手; 敌手; （争论的）对方
our opponents in Saturday's game 我们星期六的比赛对手
a political opponent 政敌
Her opponent left the tennis court in tears. 她的对手含泪离开了网球场.
(b) ~ (of sth) person who is against sth and tries to change or destroy it 反对者
a fierce opponent of nuclear arms 强烈反对核武器的人
opponents of abortion 反对堕胎的人.