stupefying

adjectives

so surprisingly impressive as to stun or overwhelm
"such an enormous response was astonishing"; "an astounding achievement"; "the amount of money required was staggering"; "suffered a staggering defeat"; "the figure inside the boucle dress was stupefying"
making physically stupid or dull or insensible
"a stupefying blow to the head"; "the stupefying effects of hemp"
is similar to
causing loss of physical or intellectual bearings
"making so many turns to the right and then the left was completely disorienting"; "a sharp blow to the head can be disorienting"
shocking with surprise and consternation
"the stupefying impact of the tragedy"
is similar to
frightening because of an awareness of danger