Grammar
-(으)ㄹ지
whether / what / how (embedded question)
Form
Verb or adjective stem + -(으)ㄹ지 — “whether”, “what”, or “how”, depending on the question word.
Function
Introduces an embedded question about something uncertain, often future, before verbs such as 모르다 or 알다.
Why this form?
-는지 — whether / what (present or ongoing) : asks about a current or habitual fact; -(으)ㄹ지 is typically future-oriented or hypothetical.
How to build it
Following 뭘, it means “what…”. The fragment -지 alone does not express that entire meaning without its question construction.
Forms not to confuse
-는지
어디에 있는지 몰라요. — I don’t know where it is.
Examples
뭘 보게 될지 무서워요. — I’m afraid of what I might see.
내일 비가 올지 모르겠어요. — I don’t know whether it will rain tomorrow.