catch a coldAn informal form of 감기 걸리다, meaning to catch or come down with a cold. The ending 걸려 can also connect to what follows, as in 감기 걸려서 (“because I caught a cold”).
KO: 감기 걸려서 오늘은 집에서 쉴 거예요.
EN: I caught a cold, so I’m going to rest at home today.