This is the 207th most frequent Korean word.
자신이
"자신이" means "oneself" or "one's own self" in English.
The word '자신이' here refers to the subject ('he himself') emphasizing his own desires or knowledge.
그는 자신이 무엇을 원하는지 정확히 안다.
He knows exactly what he wants.
Here, '자신이' indicates the subject ('you yourself'), emphasizing personal capability or actions.
자신이 할 수 있는 일에 집중하세요.
Focus on what you can do.
In this sentence, '자신이' denotes self-confidence or self-assurance, playing the role of the topic under discussion.