Meaning

noun chemical process in which one atom or ion or group changes places with another

noun a mutual expression of views (especially an unpleasant one)

noun the act of changing one thing for another thing

originFrom Middle English eschaungen, from Anglo-Norman eschaungier, Old French eschanger, from the Old French verb eschangier, eschanger (whence modern French échanger), from Vulgar Latin *excambiāre (from Latin ex with Late Latin cambiō). Gradually displaced native Old English wrixlan, wixlan (“to change, exchange, reciprocate”) and its descendants, wrixle being one of them.

Etymology from Wiktionary, CC BY-SA 3.0