sadden

Etymology

From Middle English saddenen, equivalent to sad + -en.

verb

1. (transitive) To make sad or unhappy.
   It saddens me to think that I might have hurt someone.
2. (intransitive, rare) To become sad or unhappy.
   Hyacinth perfume tickled her senses, making her feel giddy, but she saddened when she saw how uncared for the garden was. 1999, Mary Ann Mitchell, Drawn To The Grave
3. (transitive, rare) To darken a color during dyeing.
4. (transitive) To render heavy or cohesive.