challenger
🇺🇸
/ˈtʃælɪndʒər/
🇬🇧
/ˈtʃælɪndʒə(r)/
A person who tries to win something from someone else by competing against them.
The challenger gave an impressive speech during the debate.
논쟁 중에 도전자는 인상적인 연설을 했다.