The Collaborative International Dictionary of English v.0.48:

Forego \Fore*go"\, v. t. [imp. Forewent 2; p. p. Foregone
   (?; 115); p. pr. & vb. n. Foregoing.] [See Forgo.]
   1. To quit; to relinquish; to leave.
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            Stay at the third cup, or forego the place.
                                                  --Herbert.
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   2. To relinquish the enjoyment or advantage of; to give up;
      to resign; to renounce; -- said of a thing already
      enjoyed, or of one within reach, or anticipated.
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            All my patrimony,,
            If need be, I am ready to forego.     --Milton.
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            Thy lovers must their promised heaven forego.
                                                  --Keble.
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            [He] never forewent an opportunity of honest profit.
                                                  --R. L.
                                                  Stevenson.
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   Note: Forgo is the better spelling etymologically, but the
         word has been confused with Forego, to go before.
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