poleaxe          
verb [ T ] uk/ˈpəʊl.æks/ us/ˈpoʊl.æks/ (US also poleax)
 把…打昏;把…击倒在地
to hit someone so hard that they fall down
  Blake was poleaxed by a missile thrown from the crowd. 布莱克被人群中投掷过来的东西打昏在地。 
  informal使目瞪口呆 
to give someone such a great shock that they do not know what to do
  He was completely poleaxed when his wife left him. 当妻子离开他时,他震惊得不知所措。