burnish
Word family nounburnisherburnishingburnishmentverbburnish
bur·nish /ˈbɜːnɪʃ $ ˈbɜːr-/ verb [transitiveT] formal 2 to work hard in order to improve something 努力改善 He missed no opportunity to burnish his image. 他时刻不忘美化自己的形象。
—burnished adjectiveadj
Origin burnish (1300-1400) Old French brunir “to make brown, cause to shine”, from brun “brown”