However, there are some terms that include the concept of marriage, but they aren't strictly suffixes:
* -mony: This suffix appears in words like "matrimony" which refers to the state of being married.
* -wed: This is often used as a verb, meaning "to marry." For example, "They were wed in a beautiful ceremony."
Ultimately, "marriage" itself is a complete word, and there isn't a specific suffix that directly means "related to marriage."