This is the 1089th most frequent Korean word.
it
The Korean word "it" means "thing" or "item."
In this sentence '그것은' refers to a definite object or thing previously mentioned, serving as the subject.
그것은 공원 밖에 있습니다.
It is outside the park.
Here '그것을' represents the direct object of the action, i.e., the thing being understood.
나는 그것을 이해하지 못했어요.
I didn’t understand it.
'그것이' serves as the subject to emphasize the specific thing being discussed, marked by the subject particle '이'.