This is the 14313th most frequent Korean word.
몰랐던
"Didn't know."
Here, '몰랐던' describes a past state of not knowing about a fact, emphasizing an earlier lack of awareness that has since been resolved.
나는 몰랐던 사실을 이제 깨달았다.
I realized a fact that I had not known before.
In this context, '몰랐던' refers to the unawareness of a beautiful view's existence in the past.
그렇게 아름다운 풍경이 있는 줄은 몰랐던 것이다.
I did not know that such a beautiful view existed.
Here, '몰랐던' highlights stories that were previously unknown but bring to light the potential for new understanding or discovery.