concuss

from WordNet (r) 3.0 (2006)

concuss
    v 1: shake violently
    2: injure the brain; sustain a concussion

from The Collaborative International Dictionary of English v.0.48

Concuss \Con*cuss"\, v. t. [L. concussus, p. p. of concutere.
   See {Concussion}.]
   1. To shake or agitate. "Concussed with uncertainty."
      --Daniel.
      [1913 Webster]

   2. (Law) To force (a person) to do something, or give up
      something, by intimidation; to coerce. --Wharton.
      [1913 Webster]