stun

/stʌn/
verb
  1. To make a person or animal unconscious or unable to think clearly, especially by hitting them on the head or using a shock.
    • He hit his head on the low beam and was stunned for a few seconds.
    • The boxer landed a punch that stunned his opponent for a moment.
    • The electric shock from the fence was enough to stun the cow but not hurt it.
  2. To shock or surprise someone so much that they cannot react or speak immediately.
    • The news of her promotion stunned everyone in the office.
    • I was stunned to learn that my best friend was moving away.
    • The audience was stunned by the magician's incredible trick.
Antonyms
noun
  1. A state of being stunned; a shock or daze.
    • After the loud explosion, he sat in a stun for several minutes.
    • The sudden loss left the team in a stun.
    • She shook off the stun and quickly ran for help.