a structure or object that impedes free movement
any condition that makes it difficult to make progress or to achieve an objective
anything serving to maintain separation by obstructing vision or access
fall or come down violently
a loud resonant repeating noise
a serious accident (usually involving one or more vehicles)
move with, or as if with, a crashing noise
undergo damage or destruction on impact
break violently or noisily; smash;
the act of colliding with something
