말 못

can't say

→ 말
phrase Common #4,658
can't say Usually followed by 해 or 해요; depending on context, it can also mean “can't tell” or “can't speak.”
KO: 그건 비밀이라 말 못 해.
EN: I can't tell you because it's a secret.

미리 말 못 한 거 미안해

Sorry I didn’t tell you sooner.

— Kill Boksoon (2023)