Sadden

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.