Verb

• S: (v) besot, stupefy (make dull or stupid or muddle with drunkenness or infatuation)
• S: (v) perplex, vex, stick, get, puzzle, mystify, baffle, beat, pose, bewilder, flummox, stupefy, nonplus, gravel, amaze, dumbfound (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"
• S: (v) stun, stupefy (make senseless or dizzy by or as if by a blow) "stun fish"

Adjective

• S: (adj) dumbfounded, dumfounded, flabbergasted, stupefied, thunderstruck, dumbstruck, dumbstricken (as if struck dumb with astonishment and surprise) "a circle of policemen stood dumbfounded by her denial of having seen the accident"; "the flabbergasted aldermen were speechless"; "was thunderstruck by the news of his promotion"
• S: (adj) dazed, stunned, stupefied, stupid (in a state of mental numbness especially as resulting from shock) "he had a dazed expression on his face"; "lay semiconscious, stunned (or stupefied) by the blow"; "was stupid from fatigue"