혼자 두고

leave alone

→ 혼자
phrase Rare #20,561
leave alone 혼자 means “alone,” and 두다 means “to leave” or “to put.” The ending -고 connects this action to what follows.
KO: 아이를 혼자 두고 나가지 마세요.
EN: Don’t leave the child alone and go out.