The Collaborative International Dictionary of English v.0.48:

Prejudicate \Pre*ju"di*cate\, v. t. [imp. & p. p.
   Prejudicated; p. pr. & vb. n. Prejudicating.] [Cf.
   Prejudge.]
   To determine beforehand, especially to disadvantage; to
   prejudge.
   [1913 Webster]

         Our dearest friend
         Prejudicates the business.               --Shak.
   [1913 Webster]