concuss
verb
[ kənˈkʌs ]
• cause (someone) to become temporarily unconscious or confused by hitting them on the head.
• "he was concussed by a cowardly punch from behind"
Origin:
late 16th century (in the sense ‘shake violently’): from Latin concuss- ‘dashed together, violently shaken’, from the verb concutere, from con- ‘together’ + quatere ‘shake’.
