Truncation, also known as stemming, uses a character such as asterisk (*) or question mark (?) at the end of a word, which allows you to search for a root form of a word and pick up any ending.
Example: typing teen* will find teen, teens, teenage, teenager, teenagers.
Wildcard symbols can be typed in place of a letter or letters within a keyword if you are not sure of the spelling or if there are different forms of the root word.
Example: wom?n will find both women and woman.
Note: Again, check the Help or Tips links available on most library databases and Internet search engines to verify the wildcard symbol that should be used - usually an asterisk (*) or question mark (?)
Look for the database's Help page. There is usually a link to the Help section of each database (e.g., Look for: Help, Tips, FAQ, Advanced Search). They usually provide good examples of how to search. You can always ask a librarian as well.