the world > movement > impact > striking > striking with specific degree of force > [adjective] > striking hard or vigorously > hard or vigorous (of blows) (4)
Of a blow, collision, etc.: hard, heavy.
Of a blow: violent, severe.
Physically painful; damaging, severe; (of a blow) very hard.
Of a blow (or the like): Delivered with full force; (hit or hitting) straight and hard. poetic.