모른

모른

"모른" is not a standalone word; it is a conjugated form meaning "not knowing" or "unknown" from the verb 모르다 ("to not know").

The usage of '모른' here is for expressing the speaker's lack of knowledge about someone's action or reason.

나는 그녀가 왜 그렇게 했는지 모른다.

I don't know why she did that.

In this sentence, '모른' indicates the reported speech about someone's statement of ignorance.

그가 어디에 있는지 모른다고 했어.

He said that he didn't know where he was.

Here, '모른' is used in a descriptive clause to reflect the general observation of lack of knowledge among people.

이 책이 무슨 내용인지 모르는 사람이 많은가 봐.

It seems like many people don't know the content of this book.