clouding
  光澤面的暗晦,溼潤,不清爽
  Cloud v. t. [imp. & p. p. Clouded; p. pr. & vb. n. Clouding.]
  1. To overspread or hide with a cloud or clouds; as, the sky is clouded.
  2. To darken or obscure, as if by hiding or enveloping with a cloud; hence, to render gloomy or sullen.
  One day too late, I fear me, noble lord,
  Hath clouded all thy happy days on earth.   --Shak.
     Be not disheartened, then, nor cloud those looks.   --Milton.
     Nothing clouds men's minds and impairs their honesty like prejudice.   --M. Arnold.
  3. To blacken; to sully; to stain; to tarnish; to damage; -- esp. used of reputation or character.
  I would not be a stander-by to hear
  My sovereign mistress clouded so, without
  My present vengeance taken.   --Shak.
  4. To mark with, or darken in, veins or sports; to variegate with colors; as, to cloud yarn.
     And the nice conduct of a clouded cane.   --Pope.
  Cloud·ing, n.
  1. A mottled appearance given to ribbons and silks in the process of dyeing.
  2. A diversity of colors in yarn, recurring at regular intervals.
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  clouding
       n : the process whereby water particles become visible in the
           sky [syn: clouding up]