broad·en /ˈbrɔdṇ/
 (vi.)變寬,擴大(vt.)放寬,使擴大


 broaden
 擴展


 Broad·en v. t. [imp. & p. p. Broadened p. pr. & vb. n. Broadening ]  To grow broad; to become broader or wider.
    The broadening sun appears.   --Wordsworth.


 Broad·en, v. t. To make broad or broader; to render more broad or comprehensive.

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 broaden
      v 1: make broader; "broaden the road"
      2: extend in scope or range or area; "The law was extended to
         all citizens"; "widen the range of applications"; "broaden
         your horizon"; "Extend your backyard" [syn: widen, extend]
      3: vary in order to spread risk or to expand; "The company
         diversified" [syn: diversify, branch out] [ant: specialize,
          specialize]
      4: become broader; "The road broadened"