The Collaborative International Dictionary of English v.0.48:

Forewit \Fore"wit`\, n.
   1. A leader, or would-be leader, in matters of knowledge or
      taste. [Obs.]
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            Nor that the forewits, that would draw the rest unto
            their liking, always like the best.   --B. Jonson.
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   2. Foresight; prudence.
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            Let this forewit guide thy thought.   --Southwell.
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