need·less /ˈnidləs/
  (a.)不必要的,不需要的,多餘的
  Nee·dless a.
  1. Having no need. [Obs.]
     Weeping into the needless stream.   --Shak.
  2. Not wanted; unnecessary; not requisite; as, needless labor; needless expenses.
  3. Without sufficient cause; groundless; causeless. “Needless jealousy.”
  -- Need*less*ly, adv. -- Need*less*ness, n.
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  needless
       adj : unnecessary and unwarranted; "a strikers' tent camp...was
             burned with needless loss of life" [syn: gratuitous,
             uncalled-for]