몰라서

because (someone) doesn’t know

→ 모르다
몰라 Informal present + 서 Cause/result connective ending
verb Common #5,511
because (someone) doesn’t know The subject is usually understood from context.
KO: 주소를 몰라서 전화했어요.
EN: I called because I didn’t know the address.
Conjugation of 모르다

아, 학생들 이야말로 뭘 몰라서 그렇지

Ah, it’s just that students don’t know any better.

— 택시운전사 (2017)

몰라서 물어요?

Are you asking because you don't know?

— 400번의 구타 (1959)

몰라서 물으세요?

Are you asking because you don't know?

— 반지의 제왕: 왕의 귀환 (2003)

혹시 몰라서 그릇 좀 더 가져왔다

I brought a few extra bowls just in case.

— My Name Is Loh Kiwan (2024)

자네를 몰라서 공격한 거 야

They attacked you because they didn't know you.

— 연인 (2004)

뻔하지 몰라서 물어?

Are you asking because it's obvious?

— 아메리칸 갱스터 (2007)

몰라서 이럴까 봐?

Are you doing this because you don't know?

— 몬스터 주식회사 (2001)

내 결정이 다 꽝 이었던 거 몰라서?

Didn't you know all my decisions were bad?

— 아틀란티스: 잃어버린 제국 (2001)

주소를 몰라서 현장에 늦었어요

I was late to the site because I didn’t know the address.

— 나이트 워치 (2004)

먼 길 왔는데 또 언제 올지 몰라서 이해는 하지만 불가능해요

I understand, since you’ve come a long way and might not get another chance to come, but it’s impossible.

— 원스 어폰 어 타임 인… 할리우드 (2019)

몰라서 하는 소리!

You're talking nonsense!

— 무인 곽원갑 (2006)

내가 영어를 몰라서 그러는데 뭐라고 쓰여 있는데요?

I don't know English, so what does it say?

— Good News (2025)