Meaning

noun a shallow salt lake in south central Australia about 35 feet below sea level; the largest lake in the country and the lowest point on the continent

originFrom Middle English eire, from Old French erre (“journey, march, way”), from Latin iter, itineris (“a going, way”), from the root of ire (“to go”). Compare errant, itinerant, issue.

Etymology from Wiktionary, CC BY-SA 3.0