river
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river, (ultimately from Latin ripa, “bank”), any natural stream of water that flows in a channel with defined banks . Modern usage includes rivers that are multichanneled, intermittent, or ephemeral in flow and channels that are practically bankless. The concept of channeled surface flow, however, remains central to the definition. The word stream (derived ultimately from the Indo-European root srou-) emphasizes the fact of flow; as a noun, it is synonymous with river and is often preferred in technical writing. Small natural watercourses are sometimes called rivulets, but a variety of names—including branch, brook, burn, and creek—are more common, occurring ...(100 of 32811 words)