|Noah Webster's Dictionary|
(p. pr. & vb. n.) of Brighten.
Brightening (2 Occurrences)
Proverbs 4:18 But the path of the righteous is as the shining light, going on and brightening until the day be fully come. (DBY YLT)
Amos 5:9 Who is brightening up the spoiled against the strong, And the spoiled against a fortress cometh. (YLT)