은 아니지만

not ..., but

→ 은
phrase Rare #23,229
not ..., but Used after a noun or noun phrase to say that something is not exactly that, often followed by a contrasting statement. The particle 은 changes to 는 after a vowel.
KO: 완벽한 해결책은 아니지만 도움이 될 거예요.
EN: It’s not a perfect solution, but it will help.

은 아니지만 지루해?

It’s not a dud, but is it boring?

— 가장 따뜻한 색, 블루 (2013)

의 뜻은 아니지만 내가 원하는 겁니다

It may not be what Tom intended, but it’s what I want.

— 대부 (1972)

네가 생각하는 방식은 아니지만.

It’s not the way you think it is, though.

— 씨너스: 죄인들 (2025)

그런 말은 아니지만 제겐 선택권이 없잖아요

That's not what I mean, but I don't have a choice.

— 걸리 보이 (2019)