Syntax:

      /[NO]SUBDICTIONARY

  Use  /SUBDICTIONARY  to  delete  a  subdictionary  pointer  and   the
  directories   and   objects   in   the   subdictionary   file.    Use
  /NOSUBDICTIONARY to delete  a  subdictionary  pointer,  but  not  the
  directories and objects in the file to which it points.

  The  subdictionary  files  themselves  are  never  deleted.   If  you
  recreate    a    subdictionary   you   deleted   earlier   with   the
  /NOSUBDICTIONARY qualifier, the new subdictionary again points to the
  file,  and  the  dictionary directories and objects in the file again
  become part of the directory hierarchy.

  The default is /NOSUBDICTIONARY.