The Collaborative International Dictionary of English v.0.48:

Forewite \Fore*wite"\, v. t. [pres. indic. sing., 1st & 3d pers.
   Forewot, 2d person Forewost, pl. Forewiten; imp. sing.
   Forewiste, pl. Forewisten; p. pr. & vb. n. Forewiting.]
   [AS. forewitan. See Wit to know.]
   To foreknow. [Obs.] [Written also forwete.] --Chaucer.
   [1913 Webster]