Origin: Latin prefix inter-
Intermarriage has 3 different meanings across 1 category:
marriage to a person belonging to a tribe or group other than your own as required by custom or law
marriage within one's own tribe or group as required by custom or law
Marriage between people belonging to different groups, such as different racial, ethnic, or religious groups; mixed marriage.
The word comes from combining the prefix inter- with marriage. It literally means a union between people, often implying a connection across different groups.