\Sad"den\, v. t. [imp. & p. p. {Saddened}; p. pr. & vb.
n. {Saddening}.]
To make sad. Specifically:
(a) To render heavy or cohesive. [Obs.]
          Marl is binding, and saddening of land is the great
          prejudice it doth to clay lands.     --Mortimer.
(b) To make dull- or sad-colored, as cloth.
(c) To make grave or serious; to make melancholy or
    sorrowful.
          Her gloomy presence saddens all the scene. --Pope.

\Sad"den\, v. i.
To become, or be made, sad. --Tennyson.