보자마자

as soon as (someone) sees, upon seeing

보 seem, appear + 자마자 As soon as
conjunction Rare #29,982
as soon as (someone) sees, upon seeing Attached to a verb stem; the subject is understood from context.
KO: 그를 보자마자 웃었어요.
EN: As soon as I saw him, I smiled.

천 년 전 같으면 보자마자 죽였을 거 야

A thousand years ago, I would’ve killed you the moment I saw you.

— 아틀란티스: 잃어버린 제국 (2001)

버스에서 보자마자 알았지

I knew it as soon as I saw you on the bus.

— 워 머신: 전쟁 기계 (2026)

그 여자를 보자마자 내 자리가 끝 이란 걸 알았죠

The moment I saw her, I knew my time was up.

— TAR 타르 (2022)