Between ethnic groups, or their members(adjective)
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Use "interethnic" in a sentence
"For outsiders looking in, last week's carnage was just one more senseless episode of "interethnic" violence."
"I noted the use of "interethnic" in this article several times, which seems to offer another way of naming the differences between people of different backgrounds who marry outside the set of individuals their families might have expected them to choose from."
"Paul’s international church built on existing cosmopolitan values of interethnic tolerance and amity, but in offering its international networking services to congregants, the church went beyond those values; a kind of interethnic love was the core value that held the system together."