vex in WordNet English dictionary

1. change the arrangement or position of
   agitate  vex  disturb  commove  shake up  stir up  raise up 
   
2. cause annoyance in; disturb, especially by minor irritations
   "Mosquitoes buzzing in my ear really bothers me"; "It irritates me that she never closes the door after she leaves"
   annoy  rag  get to  bother  get at  irritate  rile  nark  nettle  gravel  vex  chafe  devil 
   
3. be a mystery or bewildering to
   "This beats me!"; "Got me--I don't know the answer!"; "a vexing problem"; "This question really stuck me"
   perplex  vex  stick  get  puzzle  mystify  baffle  beat  pose  bewilder  flummox  stupefy  nonplus  gravel  amaze  dumbfound 
   
4. subject to prolonged examination, discussion, or deliberation
   "vex the subject of the death penalty"
   vex 
   
5. disturb the peace of mind of; afflict with mental agitation or distress
   "I cannot sleep--my daughter's health is worrying me"
   worry  vex