mésalliance noun.
[mezaljs (pl. same), mɛ'zalɪǝns] L18.[French, from més- MIS-1 2 + alliance ALLIANCE. Cf. MISALLIANCE.]A marriage with a person thought to be of inferior social position; an unsuitable union.
■ Q. Bell When..Julia's relations did make a really disastrous mésalliance the young couple were firmly..removed to the colonies. [TahlilGaran] English Dictionary ▲