stun
Concise Oxford English Dictionary © 2008 Oxford University Press:
stun/stʌn/
▶verb (stuns, stunning, stunned)
- 1 knock unconscious or into a dazed or semi-conscious state.
- 2 astonish or shock (someone) so that they are temporarily unable to react.
– origin ME: shortening of OFr. estoner ‘astonish’.
'stun' also found in these Oxford entries:

