쳐다보면

if you look at, if you stare at

→ 쳐다보다
verb Rare #22,937
if you look at, if you stare at The ending -면 means “if” or “when.”
KO: 사람을 오래 쳐다보면 실례예요.
EN: It’s rude if you stare at someone for a long time.
Conjugation of 쳐다보다
Conditional
쳐다보면

근데 날 쳐다보면 안 돼요

But you mustn't look at me.

— 순응자 (1971)

난 쳐다보면 일을 못 봐

I can't go to the bathroom if you're watching me.

— 석양의 무법자 (1966)