English
riverplainriverplain
From river + plain.
A compound of river + plain
Proto-Indo-European *h₁reyp- ‘to scratch, tear’
…
Latin rīpārius ‘of a riverbank’
Early Medieval Latin rīpāria ‘littoral, riverbank’
Anglo-Norman riviere
Middle English ryver ‘a river’
English river
Latin plānus ‘flat, even, level’
Anglo-Norman pleyn
Middle English pleyn ‘clear’
English plain
Today it means
noun The alluvial plain of a river.
Sources
Sources: Wiktionary, “riverplain”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.
Etymograph / riverplain
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