polish up

Từ điển WordNet v3.1 - WordNet Dictionary

verb

bring to a highly developed, finished, or refined state
- polish your social manners
• Syn:
polish, round, round off, brush up
• Derivationally related forms:
polish (for: polish)
• Hypernyms:
perfect, hone
• Verb Frames:
- Somebody ----s something
- Something ----s something