1) Agitate 2) Shake 3) Shake violently 4) Stun 
• (v. t.) To shake or agitate. • (v. t.) To force (a person) to do something, or give up something, by intimidation; to coerce.
Con·cuss' transitive verb [ Latin concussus , past participle of concutere . See Concussion .] 1. To shake or agitate. ' Concussed with uncertainty.' Daniel. 2. (Law) To force (a person) to do something, or give up something, by intimidation;...
[v] - shake violently 2. [v] - injure the brain
verb injure the brain; sustain a concussion
to injure by concussion: He was mildly concussed by the falling books.