なくて의 문법 검색 결과

ずにすむ

Not doing A will suffice; Can get by without doing A

て、~で

Since V1then V2

なくてもいい

Don't have to A

ても、~でも

Even if A

なくてはいけない

Must do A; have to A

でなくてなんだろう

It's definitely A (and not something else)