났나 봐

seems to have happened

→ 나다
phrase Rare #20,188
seems to have happened Used to make a guess or inference, often about something that happened. The verb before it can change depending on the context.
KO: 열이 났나 봐.
EN: Looks like they got a fever.

세상에, 널 못 찾아서 화가 많이 났나 봐

Oh my gosh, they must have been really upset because they couldn’t find you.

— 인생은 아름다워 (1997)

승객이 많아서 멀미 났나 봐

I guess I got motion sick because there were so many passengers.

— 동경 이야기 (1953)

수안아, 저기 무슨 일 났나 봐

Suan, looks like something happened over there.

— 부산행 (2016)