Brighten

verb

1. To make bright or brighter in color.

   "We brightened the room with a new coat of paint."

2. To make illustrious, or more distinguished; to add luster or splendor to
3. To make more cheerful and pleasant; to enliven

   "to brighten one's prospects;  Having Mark around the place really brightens things up."

4. To grow bright, or more bright in color; to clear up

   "The sun starts to brighten around this time of the year.  The sky brightened as the storm moved on."

5. To become brighter or more cheerful in mood

   "She brightened when I changed the subject."