맛있구나

is delicious, tastes good

→ 맛있다
맛있 delicious, tasty + 구나 Exclamative
adjective Rare #25,815
is delicious, tastes good Expresses the speaker's realization or exclamation that something tastes good.
KO: 이 케이크 정말 맛있구나!
EN: This cake is really delicious!
Forms of 맛있다

맛있구나

Oh, it's delicious.

— 마사안 (2015)

아니야, 맛있구나

No, it's delicious.

— 음식남녀 (1994)

맛있구나!!

Oh, it's delicious!!

— 극장판 귀멸의 칼날: 무한열차편 (2020)

정말 맛있구나

Wow, this is really delicious.

— 행복한 라짜로 (2018)