darken

(därˈkən)

1. a. To make dark or darker.
   b. To give a darker hue to.
2. To fill with sadness; make gloomy.
3. To render vague or uncertain; obscure: The sudden drop in stock prices darkened the future for investors.
4. To tarnish or stain: a scandal that darkened the family's good name.

Related Forms:

• darkˈen·er noun