gild         
verb [ T ] uk/ɡɪld/ us/ɡɪld/
 给…镀金;给…涂上金色
to cover a surface with a thin layer of gold or a substance that looks like gold
  literary(光)把…染成金色 
to cover the surface of something with bright, gold-coloured light
  Sunlight gilded the children's faces. 孩子们的脸庞在阳光下熠熠生辉。 
 Idiom   
gild the lilyidiom  disapproving 画蛇添足,多此一举
to improve or decorate something that is already perfect and therefore spoil it
  Should I add a scarf to this jacket or would it be gilding the lily? 穿上这件外套我再配条围巾好吗?不会显得画蛇添足吧?