expound expound /ɪkˈspaʊnd/

verb

1. () Add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing  ( dilate , expand , expatiate , elaborate , enlarge , exposit , expound , flesh out , lucubrate )
   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
   She elaborated on the main ideas in her dissertation
   
2. State  ( exposit , expound , set forth )
   state
    Set forth one's reasons
   set forth one's reasons