없구만

there is no, be absent, not have

→ 없다
없 not have, be without; be absent, not exist + 구만 Exclamatory ending (realization or mild surprise)
adjective Rare #28,046
there is no, be absent, not have The ending -구만 is colloquial and conveys the speaker's realization or surprise.
KO: 오늘은 시간이 없구만.
EN: Looks like there’s no time today.
Forms of 없다

아는 게 하나도 없구만

You don't know a thing, do you?

— 바다의 노래: 벤과 셀키 요정의 비밀 (2014)

그럼 방법이 없구만

Well, I guess there’s no other way.

— Good News (2025)