The wildcard (*) is available, however it can only be used at the end of a word: otherwise is is considerd a normal character (i.e. can be searched for if included in the WordCharacters directive). 

        swish-e -w "librarian" -f myIndex
 


this query only retrieves files which contain the given word. 

On the other hand: 

        swish-e -w "librarian*" -f myIndex
 


retrieves ``librarians'', ``librarianship'', etc. along with ``librarian''.