wane /ˈwen/
  衰微,虧缺,月虧(vi.)變小,虧缺,衰落,呈下弦,消逝,退潮
  Wane v. i. [imp. & p. p. Waned p. pr. & vb. n. Waning.]
  1. To be diminished; to decrease; -- contrasted with wax, and especially applied to the illuminated part of the moon.
  Like the moon, aye wax ye and wane.
  Waning moons their settled periods keep.   --Addison.
  2. To decline; to fail; to sink.
     You saw but sorrow in its waning form.   --Dryden.
     Land and trade ever will wax and wane together.   --Sir J. Child.
  Wane, v. t. To cause to decrease.  [Obs.]
  Wane, n.
  1. The decrease of the illuminated part of the moon to the eye of a spectator.
  2. Decline; failure; diminution; decrease; declension.
     An age in which the church is in its wane.   --South.
     Though the year be on the wane.   --Keble.
  3. An inequality in a board.  [Prov. Eng.]
  4. Forestry The natural curvature of a log or of the edge of a board sawed from a log.
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  wane
       n : a gradual decline (in size or strength or power or number)
           [syn: ebb, ebbing]
       v 1: grow smaller; "Interest in the project waned" [syn: decline,
             go down]
       2: become smaller; "Interest in his novels waned" [ant: wax]
       3: decrease in phase; "the moon is waning" [ant: wax]