W: (v) expand [Opposed to: contract] (add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing) "She elaborated on the main ideas in her dissertation"
S: (v) change, alter, modify (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"