This template is used to create expandable category trees at entries for suffixes. For example, -al#Spanish contains this wikitext:
{{suffixsee|es}}
and thereby generates this output:
To use a different suffix than the page name (for example to make a list of related words of a suffixed term), use the "head" parameter:
{{suffixsee|en|head=-onym}}
which yields:
{{prefixsee}}
{{interfixsee}}
{{circumfixsee}}