n. the contestant you hope to defeat
v. be the rival of, be in competition with
n. 对手, 竞争者
a. 竞争的
1. My brother is my biggest rival in sports.
我哥哥是我在运动中最大的对手。
2. The two companies are rivals in the tech industry.
这两家公司是科技行业的竞争对手。
3. She always tries to outperform her rival in exams.
她总是试图在考试中超越她的对手。