아니겠죠

probably isn't; surely isn't

→ 아니다
아니 not be + 겠 conjecture or future + 죠 Polite sentence-ending (confirmation)
adjective Rare #29,401
probably isn't; surely isn't A polite way to express an expectation or guess, often while seeking confirmation.
KO: 이건 큰 문제는 아니겠죠?
EN: This probably isn't a big problem, right?
Forms of 아니다

마약은 아니겠죠?

It's not drugs, is it?

— 8과 1/2 (1963)

어쩌면 설마 아니겠죠

Surely it isn't, right?

— "폭풍의 언덕" (2026)

음탕한 생각은 아니겠죠

You're not having dirty thoughts, are you?

— 8과 1/2 (1963)

설마 미국은 아니겠죠?

Surely not the United States?

— 벼랑 위의 포뇨 (2008)