strike down in WordNet English dictionary

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