Meaning

noun a large natural stream of water (larger than a creek)

originFrom Middle English ryver, from Anglo-Norman rivere, from Early Medieval Latin rīpāria (“littoral, riverbank”), from Latin rīpārius (“of a riverbank”), from Latin rīpa (“river bank”), from Proto-Indo-European *h₁reyp- (“to scratch, tear, cut”). Unrelated to Latin rīvus (“stream”) (whence rival, derive). Doublet of riviera and rivière. Displaced native Old English ēa.

Etymology from Wiktionary, CC BY-SA 3.0