When to use to block in Korean
Korean: 막다[ mak-da ]

When to use it
막다 means "to block" or "to stop something from passing through." You can use it when a person or thing closes a way, covers an opening, or gets in the way. It is also used in simple everyday situations like blocking a door, a road, sunlight, or even interrupting someone.
Example sentences
상자가 문을 막고 있어요.
A box is blocking the door.
친구가 칠판을 막아서 안 보여요.
My friend is blocking the blackboard, so I can't see.
경찰이 길을 막았어요.
The police blocked the road.
입구를 막지 마세요.
Please don't block the entrance.
우산으로 햇빛을 막아요.
I block the sunlight with an umbrella.
제 말을 막지 마세요.
Please don't interrupt me.