This is the 2121st most frequent Korean word.
요인이다
"To be a factor" or "To be a cause."
In this sentence, '요인이다' is used to state that the subject is a factor influencing or causing the event described.
이 사건의 주요 요인이다.
This is the main factor of this incident.
Here, '요인이다' denotes the identifying of a cause or source, linking it to the consequence.
경제 성장은 정책 변화의 중요한 요인이다.
Economic growth is a significant factor resulting from policy changes.
'요인이다' in this context is used to state the importance or impact of the subject on the situation.