[with obj.][usu. as adj. concussed]hit the head of (a person or animal), causing them to become temporarily unconscious or confused 击打(人,动物的)头部以使暂时失去知觉(或神志不清) Michael was a bit concussed. 迈克尔被打得有点神志不清。
派生 concussive adjective 语源
late 16th cent. (in the sense 'shake violently'): from Latin concuss- 'dashed together, violently shaken', from the verb concutere, from con- 'together' + quatere 'shake'