root·age /ˈrutɪʤ, ˈrʊ-/
  生根,根,開始
  rootage
       n 1: fixedness by or as if by roots; "strengthened by rootage in
            the firm soil of faith"
       2: a developed system of roots [syn: root system]
       3: the place where something begins, where it springs into
          being; "the Italian beginning of the Renaissance";
          "Jupiter was the origin of the radiation"; "Pittsburgh is
          the source of the Ohio River"; "communism's Russian root"
          [syn: beginning, origin, root, source]