knock down

knock down (http://definr.com/knock down)

     v 1: cause to come or go down; "The policeman downed the heavily
          armed suspect"; "The mugger knocked down the old lady
          after she refused to hand over her wallet" [syn: down,
           cut down, push down, pull down]
     2: knock down with force; "He decked his opponent" [syn: deck,
         coldcock, dump, floor]