어렸을 땐

when I was young

→ 어리다
phrase Rare #26,590
when I was young A shortened form of 어렸을 때는. The person being described is understood from context, so it can also mean “when you were young” or “when they were young.”
KO: 어렸을 땐 매일 공원에서 놀았어요.
EN: When I was young, I played in the park every day.

어렸을 땐 진짜로 진짜 발레리나가 되고 싶었어요.

When I was little, I really, really wanted to become a ballerina.

— 발레리나 (2025)

아주 어렸을 땐 그랬을 텐데

I must have been like that when I was really little, though.

— 버닝 (2018)

어렸을 땐 그렇게 살았잖아

We used to live that way when we were younger, you know.

— 가구야공주 이야기 (2013)