The Collaborative International Dictionary of English v.0.48:

Wherewith \Where*with"\, adv.
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   1. With which; -- used relatively.
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            The love wherewith thou hast loved me. --John xvii.
                                                  26.
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   2. With what; -- used interrogatively.
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            Wherewith shall I save Israel?        --Judg. vi.
                                                  15.
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The Collaborative International Dictionary of English v.0.48:

Wherewith \Where*with"\, n.
   The necessary means or instrument.
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         So shall I have wherewith to answer him. --Ps. cxix.
                                                  42.
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         The wherewith to meet excessive loss by radiation. --H.
                                                  Spencer.
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