제대로 못

can't properly

→ 제대로
phrase Rare #16,235
can't properly Used before a verb to mean being unable to do something correctly, fully, or as expected. The exact tense depends on the context.
KO: 시간이 없어서 숙제를 제대로 못 했어요.
EN: I couldn't do my homework properly because I didn't have enough time.

아니, 제대로 못 찍었어

No, I didn’t get a good shot.

— 아나콘다 (2025)