burnish
verb /ˈbɜːnɪʃ/
  /ˈbɜːrnɪʃ/
(formal)Verb Forms
| present simple I / you / we / they burnish |    /ˈbɜːnɪʃ/   /ˈbɜːrnɪʃ/  | 
| he / she / it burnishes |    /ˈbɜːnɪʃɪz/   /ˈbɜːrnɪʃɪz/  | 
| past simple burnished |    /ˈbɜːnɪʃt/   /ˈbɜːrnɪʃt/  | 
| past participle burnished |    /ˈbɜːnɪʃt/   /ˈbɜːrnɪʃt/  | 
| -ing form burnishing |    /ˈbɜːnɪʃɪŋ/   /ˈbɜːrnɪʃɪŋ/  | 
- burnish something to polish metal until it is smooth and shinyOxford Collocations DictionaryBurnish is used with these nouns as the object:
- credentials
 - image
 
Word OriginMiddle English: from Old French burniss-, lengthened stem of burnir, variant of brunir ‘make brown’, from brun ‘brown’.