Blow

a powerful stroke with the fist or a weapon; "a blow on the head" an impact (as from a collision); "the bump threw him off the bicycle" an unfortunate happening that hinders or impedes; something that is thwarting or frustrating an unpleasant or disappointing surprise; "it came as a shock to learn that he was injured" a strong current of air; "the tree was bent almost double by the gust" street names for cocaine forceful exhalation through the nose or mouth; "he gave his nose a loud blow"; "he blew out all the candles with a single puff"