strike down
    v 1: declare null and void; make ineffective; "Cancel the
         election results"; "strike down a law" [syn: cancel,
         strike down]
    2: cause to die, especially suddenly; "The disease struck down
       many young men in the village"
    3: cause to fall by or as if by delivering a blow; "strike down
       a tree"; "Lightning struck down the hikers" [syn: fell,
       drop, strike down, cut down]