Meaning

verb mix together different elements

verb open (a place) to members of all races and ethnic groups

verb combine (electronic signals)

originFrom mix, equivalent to mix + -ed. Compare Middle English mixid (“mixed”, past participle), Old English miscode (“mixed”, preterite). More at mix. In adjectival use, reinforced by French mixte and/or Latin mixtus, past participle of misceō (“mix”), from the same Indo-European root as mix.

Etymology from Wiktionary, CC BY-SA 3.0