as if struck dumb with astonishment and surprise; "a circle of policement stood dumbfounded by her denial of having seen the accident"; "the flabbergasted aldermen were speechless"; "was thunderstruck by the news of his promotion"
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"
so surprised, tired, or bored that you cannot think clearly (stupéfier, from stupefacere, from stupere ( STUPID) + facere )
If something stupefies you, it shocks or surprises you so much that you cannot think properly for a while. a violent slap on the side of the head, which stunned and stupefied him