modify in WordNet English dictionary

1. 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"
   change  alter  modify 
   
2. make less severe or harsh or extreme
   "please modify this letter to make it more polite"; "he modified his views on same-gender marriage"
   modify 
   
3. add a modifier to a constituent
   modify  qualify