떠날 때

when leaving

→ 떠나다
phrase Uncommon #11,702
when leaving Literally means “at the time of leaving.” Depending on context, it can mean “when someone leaves” or “when someone left.”
KO: 떠날 때 문을 꼭 잠가 주세요.
EN: Please make sure to lock the door when you leave.

고속도로 네가 먼 길을 떠날 때 이용하는 이지

A highway is a road you take when you’re going on a long journey.

— 머시니스트 (2004)

당신이 떠날 때 나도 마을로 갈 거 예요

When you leave, I’ll go to the village too.

— 타오르는 여인의 초상 (2019)