WordWeb Online

1. As if struck dumb with astonishment and surprise
   - dumbfounded, dumfounded, flabbergasted, thunderstruck, dumbstruck, dumbstricken
    
2. In a state of mental numbness especially as resulting from shock
   "lay semiconscious, stupefied by the blow"
   - dazed, stunned, stupid

1. Make dull or stupid or muddle with drunkenness or infatuation
   - besot
    
2. Be a mystery or bewildering to
   - perplex, vex, stick, get, puzzle, mystify, baffle, beat, pose, bewilder, flummox, nonplus, gravel, amaze, dumbfound
    
3. Make senseless or dizzy by or as if by a blow
   - stun

See also: confused, stupefaction, surprised

Type of: bedevil, befuddle, confound, confuse, desensitise [Brit], desensitize, discombobulate, fox, fuddle, immobilise [Brit], immobilize, throw