얼굴인데

it's a face, but

→ 얼굴
phrase Rare #25,962
it's a face, but 얼굴 means “face,” and 인데 adds background or contrast; depending on context, it can also be translated as “it's a face, though.”
KO: 낯익은 얼굴인데 이름이 기억나지 않아요.
EN: It's a familiar face, but I can't remember the name.

처음 보는 얼굴 인데!

I've never seen that face before!

— 얼지마, 죽지마, 부활할거야 (1990)

처음 보는 얼굴 인데 이런 사람 보신 적 있으신가요?

This is a face I’ve never seen before. Have you ever seen this person?

— Officer Black Belt (2024)

뭐, 뻔한 얼굴 인데 어떻게?

Well, it’s not exactly a distinctive face, so how could you tell?

— 살인의 추억 (2003)

이건 그 광대 얼굴 인데

This is that clown face, though.

— 델리카트슨 사람들 (1991)