빨리 끝내고

finish quickly and

→ 빨리
phrase Rare #24,991
finish quickly and The ending -고 connects this action to what follows.
KO: 빨리 끝내고 집에 가자.
EN: Let's finish quickly and go home.

빨리 끝내고 네 딸내미 보러 가야지, 응?

You’d better hurry up and finish so you can go see your daughter, huh?

— Miracle in Cell No. 7 (2013)

빨리 끝내고 카페로 돌아오면 돼

Just finish up quickly and come back to the café.

— 빅토리아 (2015)