endogamy

Definitions of endogamy
  1. noun
    marriage within one's own tribe or group as required by custom or law
    synonyms: inmarriage, intermarriage
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    Antonyms:
    exogamy, intermarriage
    marriage to a person belonging to a tribe or group other than your own as required by custom or law
    type of:
    marriage, matrimony, spousal relationship, union, wedlock
    the state of being a married couple voluntarily joined for life (or until divorce)
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