needfully

from WordNet (r) 3.0 (2006)

needfully
    adv 1: in an essential manner; "such expenses are necessarily
           incurred" [syn: {necessarily}, {needfully}] [ant:
           {unnecessarily}]

from The Collaborative International Dictionary of English v.0.48

Needful \Need"ful\ (n[=e]d"f[.u]l), a.
   1. Full of need; in need or want; needy; distressing.
      [Archaic] --Chaucer.
      [1913 Webster]

            The needful time of trouble.          --Bk. of Com.
                                                  Prayer.
      [1913 Webster]

   2. Necessary for supply or relief; requisite.
      [1913 Webster]

            All things needful for defense abound. --Dryden.
      [1913 Webster] -- {Need"ful*ly}, adv. -- {Need"ful*ness},
      n.
      [1913 Webster]