stupeo

Etymology
From, from.

Verb

 * 1)  to be stunned, stiffened or benumbed, stop, hesitate
 * 2)  to be dazed, speechless or silenced; to be astounded, confounded, aghast or amazed
 * 3)  to be astonished or amazed at, wonder at
 * 1)  to be astonished or amazed at, wonder at

Usage notes
To convey the phrase of "to surprise," the subject and object have to be reversed, due to there being a lack of passive forms.