1. dumbstruck - Adjective
2. dumbstruck - Adjective Satellite
as if struck dumb with astonishment and surprise
Source: WordNetI stare at her, as dumbstruck as if she'd just admitted she's a Scientologist with an invitation to join Tom and Katie on the spaceship when it shows up. Meg Cabot
a circle of policemen stood dumbfounded by her denial of having seen the accident Source: Internet
the flabbergasted aldermen were speechless Source: Internet
was thunderstruck by the news of his promotion Source: Internet