The Collaborative International Dictionary of English v.0.48:

Fordo \For*do"\, v. t. [OE. fordon, AS. ford?n; pref. for- + d?n
   to do. See For-, and Do, v. i.]
   1. To destroy; to undo; to ruin. [Obs.]
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            This is the night
            That either makes me or fordoes me quite. --Shak.
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   2. To overcome with fatigue; to exhaust. --M. Arnold.
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            All with weary task fordone.          --Shak.
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