Need·ful a.
  1. Full of need; in need or want; needy; distressing. [Archaic]
     The needful time of trouble.   --Bk. of Com. Prayer.
  2. Necessary for supply or relief; requisite.
     All things needful for defense abound.   --Dryden.
  -- Need*ful*ly, adv. -- Need*ful*ness, n.
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  needfully
       adv : in an essential manner; "such expenses are necessarily
             incurred" [syn: necessarily] [ant: unnecessarily]