baffle in WordNet English dictionary

1. a flat plate that controls or directs the flow of fluid or energy
   baffle  baffle board 
   

1. check the emission of (sound)
   baffle  regulate 
   
2. 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 
   
3. hinder or prevent (the efforts, plans, or desires) of
   "What ultimately frustrated every challenger was Ruth's amazing September surge"; "foil your opponent"
   thwart  queer  spoil  scotch  foil  cross  frustrate  baffle  bilk