where·with /ˈhwɛrˌwɪð, ˈhwær, ˈwɛr, ˈwær, ˌwɪθ/
  (ad.)用什?,用那個,藉其
  Where·with adv.
  1. With which; -- used relatively.
     The love wherewith thou hast loved me.   --John xvii. 26.
  2. With what; -- used interrogatively.
     Wherewith shall I save Israel?   --Judg. vi. 15.
  Where·with, n. The necessary means or instrument.
     So shall I have wherewith to answer him.   --Ps. cxix. 42.
     The wherewith to meet excessive loss by radiation.   --H. Spencer.
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  wherewith
       adv : out of, or by means of which; "tools wherewith to scrape the
             windshield of my car" [syn: wherewithal]