WordWeb Online

1. Make dull or stupid or muddle with drunkenness or infatuation
   - besot
    
2. Be a mystery or bewildering to
   "a stupefying problem"
   - 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
   "stupefy fish"
   - stun

Derived forms: stupefies, stupefying, stupefied

See also: stupefaction

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