않았으니까

because ... didn’t, since ... didn’t

→ 않다
않 not (forms a negation after -지) + 았 Past tense + 으니까 Because; since
auxiliary · informal, past tense Rare #30,244
because ... didn’t, since ... didn’t Used after 지 to say that something did not happen; the clause gives a reason.
KO: 비가 오지 않았으니까 산책하자.
EN: Since it didn’t rain, let’s go for a walk.
Conjugation of 않다

걱정 마, 먹진 않았으니까

Don't worry, I didn't eat it.

— 친절한 금자씨 (2005)

네가 받으려고 하지 않았으니까 난 정말 바보 였어

I was really stupid for trying, since you weren’t willing to accept it.

— 내 어머니의 모든 것 (1999)

매일 너 에게 거짓말을 했어 네가 상처받는 걸 원치 않았으니까 그게 너를 지키는 길 이라고 생각했는데, 이젠 잘 모르겠구나

I lied to you every day because I didn’t want you to get hurt. I thought it was the best way to protect you, but now I’m not so sure anymore.

— 헌팅시즌 (2025)