보며

while looking at, while watching

→ 보다
보 seem, appear + 며 while; and
verb Rare #22,580
while looking at, while watching Connects two actions that happen at the same time.
KO: 창밖을 보며 커피를 마셨어요.
EN: I drank coffee while looking out the window.
Conjugation of 보다

네 눈 똑바로 보며 너와 형제를 죽여주지

I'll look you straight in the eye as I kill you and your brother.

— 불릿 트레인 (2022)

난 그녀를 보며 내가 가게 이고 그녀가 나 라고 느꼈다

Looking at her, I felt as though I were the store and she were me.

— 타락천사 (1995)