잘 모르겠는데

I'm not sure

→ 잘
phrase Rare #14,041
I'm not sure A casual, softened way to say “I don't really know.” The ending -는데 can leave the sentence open, invite an explanation, or soften a question or disagreement.
KO: 잘 모르겠는데, 이게 맞는 것 같아요.
EN: I'm not sure, but I think this is right.

자기 야 지금 당신이 뭐 하는지 잘 모르겠는데 엄마?

Honey, I’m not really sure what you’re doing right now, but… Mom?

— 에브리씽 에브리웨어 올 앳 원스 (2022)

잘 모르겠는데 아빠 한테 설명해 줄래요?

I don't really understand. Could you explain it to my dad?

— 피케이: 별에서 온 얼간이 (2014)

잘 모르겠는데 어떻게 하는 거 죠?

I don't know, but how do I do it?

— TAR 타르 (2022)

잘 모르겠는데

I'm not really sure.

— 택시 (1998)