通婚,近亲结婚
Intermarry \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, 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.
intermarry v : marry within the same ethnic, social, or family group [also: {intermarried}]