The Collaborative International Dictionary of English v.0.48:

Forespeak \Fore*speak"\, v. t. [Obs.]
   See Forspeak.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Forespeak \Fore*speak"\, v. t.
   To foretell; to predict. [Obs.]
   [1913 Webster]

         My mother was half a witch; never anything that she
         forespake but came to pass.              --Beau. & Fl.
   [1913 Webster]