wane

v. i.

  1. To be diminished; to decrease; -- contrasted with wax, and especially applied to the illuminated part of the moon.
  2. To decline; to fail; to sink.

v. t.

  1. To cause to decrease.

n.

  1. The decrease of the illuminated part of the moon to the eye of a spectator.
  2. Decline; failure; diminution; decrease; declension.
  3. An inequality in a board.