flabbergast

Example:The news about his health was so shocking that it astounded everyone.

Definition:to cause (someone) to be amazed or astonished

Example:The brutal event stupified the crowd to silence.

Definition:to stun physically or mentally; to cause to be unable to think or to act

Example:Her sudden departure really dumbfounded us.

Definition:to stun, confound, or make speechless with surprise