말을 못 해

can't speak; can't say (anything)

→ 말
phrase Uncommon #11,231
can't speak; can't say (anything) Depending on context, this can mean being unable to speak generally or being unable to say something in particular.
KO: 왜 말을 못 해?
EN: Why can't you speak?

말을 못 해

I can't speak.

— Unlocked (2023)

펑샤는 왜 말을 못 해?

Why can't Fengxia speak?

— 인생 (1994)

… 왜 내 게 말을 못 해

…Why can't you talk to me?

— Love Untangled (2025)