Verb

To displease by e.g. underperforming

His lack of respect disappointed her.

I am disappointed by this year's revenue.

Verb

(head)

(Internet slang)

Verb

(en verb)

to make sad or unhappy

* (Alexander Pope)

* , chapter=7

, title= The Mirror and the Lamp , passage=The turmoil went on—no rest, no peace. […] It was nearly eleven o'clock now, and he strolled out again. In the little fair created by the costers' barrows the evening only seemed beginning; and the naphtha flares made one's eyes ache, the men's voices grated harshly, and the girls' faces saddened one.}}

(rare) to become sad or unhappy

* {{quote-book, year=1999, author=Mary Ann Mitchell, title=Drawn To The Grave citation

, passage=Hyacinth perfume tickled her senses, making her feel giddy, but she saddened when she saw how uncared for the garden was.}}

(rare) to darken a color during dyeing

to render heavy or cohesive

* Mortimer

Marl is binding, and saddening of land is the great prejudice it doth to clay lands.