modify

Verb

• cause to change; make different; cause a transformation
  • The advent of the automobile may have altered the growth pattern of the city
    
  • The discussion has changed my thinking about the issue
    

• add a modifier to a constituent

• make less severe or harsh or extreme
  • please modify this letter to make it more polite
    
  • he modified his views on same-gender marriage
    

Related words

• Synonyms: 
  change , alter , qualify