Unstemmed Index
Wildcard searches (and some Other Search Types) use the index of unstemmed terms (that is, exact terms that have not been stemmed). This index contains all the exact terms that occur in documents.
IDOL 12.12
Wildcard searches (and some Other Search Types) use the index of unstemmed terms (that is, exact terms that have not been stemmed). This index contains all the exact terms that occur in documents.