burnish
verb [ T ] uk/ˈbɜː.nɪʃ/ us/ˈbɝː.nɪʃ/
literary擦亮;使有光泽
to rub metal until it is smooth and shiny
给…增色;改善（公众形象）
If you burnish something such as your public image, you take action to improve it and make it more attractive.
The company is currently trying to burnish its socially responsible image. 公司目前正在努力改善形象，把自己塑造成一个有社会责任感的公司。
burnished
adjective literary uk/ˈbɜː.nɪʃt/ us/ˈbɝː.nɪʃt/
有光泽的；锃亮的
smooth and shiny