믿을 수가 없어

I can't believe it

→ 믿다
phrase Rare #18,122
I can't believe it An emphatic expression of disbelief, surprise, or shock. The ending 수가 없어 literally expresses that there is no way or possibility to believe something.
KO: 이게 정말 사실이라니, 믿을 수가 없어!
EN: I can't believe this is really true!

믿을 수가 없어!

I can't believe it!

— 극장판 귀멸의 칼날: 무한열차편 (2020)

난 아직도 믿을 수가 없어

I still can't believe it.

— 음식남녀 (1994)

믿을 수가 없어.

I can't believe it.

— 극장판 귀멸의 칼날: 무한성편 (2025)

믿을 수가 없어

I can't believe it

— 좋은 친구들 (1990)