같이하다 (kachihada) means “do together”

More examples

오늘 저녁에 산책을 같이할래요?o neul cheo nyeo ge san chae geul ka chi hal lae yo

Would you like to take a walk together this evening?

A shared action or task carried out by more than one person.

함께하다hamkkehada: Sharing time and a place with other people means being together, whether or not a task is involved.

둘 이상이 같은 행동이나 일을 함께 하는 동사.tul i sang i ka teun haeng dong i na i reul ham kke ha neun tong sa

The word is formed from a term meaning together and a verb meaning to do, highlighting participation in the same activity.

English speakers can remember that the word focuses on sharing the activity itself, while helping someone does not always mean taking part in it.