brightening
 增亮; 擦亮


 Bright·en, v. t. [imp. & p. p. Brightened p. pr. & vb. n. Brightening.]
 Note: [From Bright, a.]
 1. To make bright or brighter; to make to shine; to increase the luster of; to give a brighter hue to.
 2. To make illustrious, or more distinguished; to add luster or splendor to.
    The present queen would brighten her character, if she would exert her authority to instill virtues into her people.   --Swift.
 3. To improve or relieve by dispelling gloom or removing that which obscures and darkens; to shed light upon; to make cheerful; as, to brighten one's prospects.
 An ecstasy, which mothers only feel,
 Plays round my heart and brightens all my sorrow.   --Philips.
 4. To make acute or witty; to enliven.