"brightening" in the verb sense
1. brighten, lighten up, lighten
make more cheerful through the use of color
"The paint will brighten the room"
2. clear up, clear, light up, brighten
become clear
"The sky cleared after the storm"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License