막히다

For a road, passage, hole, etc., to be made impassable.

For the front of something to be blocked or encircled, so that nobody can see its inner area.

For a certain work to stop progressing as a difficult problem emerges.

For something or what one is about to do to be stopped.

For something in a part of one's body to become impassable.

For cars to not run easily because there are many cars on the road.

To act inflexibly and stubbornly.