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못해서 미안해

sorry for not being able to

→ 못하다
phrase Rare #19,992
sorry for not being able to Used to apologize for being unable to do something; the action is usually clear from context.
KO: 도와주지 못해서 미안해.
EN: I'm sorry I couldn't help.

정직한 삶을 살지 못해서 미안해.

I'm sorry I couldn't live an honest life.

— 극장판 귀멸의 칼날: 무한성편 (2025)

내 빚을 갚지 못해서 미안해!

I'm sorry I couldn't pay my debt!

— 극장판 귀멸의 칼날: 무한성편 (2025)

더 빨리 깨닫지 못해서 미안해

I'm sorry I didn't realize it sooner.

— 영원 (2025)