This is the 334th most frequent Korean word.
상대로
"상대로" means "as a counterpart" or "as an opponent."
In this sentence, '상대로' refers to facing or competing against another person, showing a direct opposition in context of competition.
상대를 이기려고 노력해야 합니다.
You need to make an effort to defeat your opponent.
Here, '상대로' indicates a specific role assigned to someone, namely being an 'opponent' in a scenario.
그는 상대로 친구를 선택했습니다.
He chose his friend as his opponent.
In this case, '상대로' is used to denote the focal subject or topic within a discussion or debate.