in·ter·mar·ry /-ˈmæri/
(vi.)通婚,近親結婚
In·ter·mar·ry v. i. To become connected by marriage between their members; to give and take mutually in marriage; -- said of families, ranks, races, castes, etc.
About the middle of the fourth century from the building of Rome, it was declared lawful for nobles and plebeians to intermarry. --Swift.
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intermarry
v : marry within the same ethnic, social, or family group
[also: intermarried]