Learn how to say Concussed correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word concuss:
[with object] (usually as adjective concussed)
hit the head of (a person or animal), causing them to become temporarily unconscious or confused:
Michael was a bit concussed
late 16th century (in the sense ‘shake violently’): from Latin concuss- ‘dashed together, violently shaken’, from the verb concutere, from con- ‘together’ + quatere ‘shake’: