động từ
to chock (wheel...), to make fast with
to drive a skate in and make it fast with a few stones
to chock a car and prevent it from rolling down the slope
to cut in deliberately, to block
the car in front cut in deliberately against the regulations
the football-plyers blocked each other
the capitalists try to block one another
force (opponent, cyclist,...) out of his path
prevent (from), hinder (from); lay obstacles (to)