Daze (verb)

1. To stun or bewilder, especially by a sudden blow or loud noise.
2. To confuse or bewilder someone.

Origin:

Late middle english (in the sense "stupefy"): from middle dutch dasen "stun", from a west germanic word meaning "dazzle".

Examples:

1. The loud explosion dazed him for a moment.
2. The bright light dazed her and she couldn't see anything.
3. The new information dazed him, he didn't know what to think.
4. The fast pace of the city dazed the small-town boy.
5. She was dazed by the enormity of the situation and didn't know what to do.