Your adversary is someone you are competing with, or arguing or fighting against.
例句
Elliott crossed the finish line just half a second behind his adversary...埃利奥特跨过终点线时仅比对手落后半秒钟。His political adversaries were creating a certain amount of trouble for him.他的政敌正在给他制造一些麻烦。
英汉词典释义
n.
对手, 敌手
He saw her as his main adversary within the company.他将她视为公司中主要的对手。