sadden

verb4

1. •
   To make sad or unhappy.

   • It saddens me to think that I might have hurt someone.
   • I was saddened that you felt so little for me.
2. •
   (rare) To become sad or unhappy.

   • He saddens, all the magic light ⁠Dies off at once from bower and hall, ⁠And all the place is dark, and all The chambers emptied of delight: […] — 1850
3. •
   To render heavy, hard, or cohesive; to compress or thicken.

   • Marle's binding and sadning of land being the great Prejudice it doth to Clay-lands. — 1707
4. •
   (rare) To darken a color during dyeing.

   • Curve (E) is seen at a glance to represent green saddened down to its fifth shade, and reduced with white to its fourth tint. — 1903