알아내면

find out, figure out

→ 알아내다
verb · informal Rare #26,766
find out, figure out Conditional form: “if/when you find out.”
KO: 주소를 알아내면 바로 갈게요.
EN: If I find out the address, I’ll go right away.
Conjugation of 알아내다
Conditional
알아내면

노파 한테서 뭘 알아내면 혼자 시내로 돌아갈 수 있겠어요?

If you can find out anything from the old woman, do you think you could make it back into town on your own?

— 싸이코 (1960)

그래도 알아내면 꼭 말해 줄게.

Still, I’ll be sure to tell you if I find out.