godan verb (-su), transitive verb
Transitive verb meaning to cause someone to feel surprise or alarm. Often used for sudden, unexpected actions that startle someone. Can also be used figuratively for causing a stir or commotion.
彼は突然大きな声を出して、みんなを驚かした。
He suddenly shouted loudly and surprised everyone.
そのニュースは世界中の人々を驚かした。
The news surprised people all over the world.