refine

Verb

• make more precise or increase the discriminatory powers of
  • refine a method of analysis
    
  • refine the constant in the equation
    

• attenuate or reduce in vigor, strength, or validity by polishing or purifying
  • many valuable nutrients are refined out of the foods in our modern diet
    

• reduce to a fine, unmixed, or pure state; separate from extraneous matter or cleanse from impurities
  • refine sugar
    

• treat or prepare so as to put in a usable condition
  • refine paper stock
    
  • refine pig iron
    
  • refine oil
    

• make more complex, intricate, or richer
  • refine a design or pattern
    

• improve or perfect by pruning or polishing
  • refine one's style of writing
    

Related words

• Synonyms: 
  rectify , complicate , rarify , elaborate , polish , fine-tune , down