This is the 9678th most frequent Korean word.
고경일
"고경일" does not have a standard definition; it appears to be a Korean name.
Here, '고경일' refers to a proper name, representing a person's name.
고경일은 오늘 발표를 잘 준비했다.
Gyeongil Ko prepared well for today's presentation.
In this sentence, '고경일' is used as a direct object, emphasizing the necessity of the person in a context.
그는 고경일 없이는 이 문제를 해결할 수 없다.
He cannot solve this problem without Gyeongil Ko.
'고경일' is functioning as the subject of a relative clause, referring to the individual performing the actions in such.