INTERMARRY
intermarry
(verb) marry within the same ethnic, social, or family group
Source: WordNet® 3.1
Etymology
Verb
intermarry (third-person singular simple present intermarries, present participle intermarrying, simple past and past participle intermarried)
To marry a member of another group, social stratum, or religion.
To marry within the same ethnic, social, or family group.
Source: Wiktionary
In`ter*mar"ry, v. i.
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition