줄 몰라

don't know how to

→ 줄
phrase Rare #19,414
don't know how to Used after a verb to say someone doesn't know how to do something. With a clause before it, it can also mean “don't realize that.”
KO: 나 수영할 줄 몰라.
EN: I don't know how to swim.

자기들만 사는 건지 제자리에 둘 줄 몰라 자기를 위해 만들었어

Do they think they’re the only ones living here? They don’t know how to put things back where they belong. I made it for myself.

— 빈폴 (2019)

저 사람들은 술을 남길 줄 몰라

Those people don't know how to leave any alcohol behind.

— 택시 블루스 (1990)

스펜서포트 사람들은 어쩔 줄 몰라 했다.

The people of Spencerport didn't know what to do.

눈 가려 가지고 난 줄 몰라

I didn't recognize them because my eyes were itchy.

— The Roundup (2022)