언제 죽을지

when someone will die

→ 언제
phrase Rare #26,411
when someone will die Used in an embedded question or uncertain statement about the time of someone's death. The ending -을지 expresses uncertainty, similar to “whether” or “when.”
KO: 그 사람이 언제 죽을지 아무도 몰라요.
EN: No one knows when that person will die.

언제 죽을지 방법이 있어요?

Is there any way to know when you will die?

— 영원 (2025)

하지만 저희도 언제 죽을지 저기

But we don't know when we'll die either, you know.

— 이키루 (1952)