Added 10 October 2026 backswamp noun Categories: Obscure Words noun ! Definition from Wiktionary (CC BY-SA). More about backswamp at Wordnik → Where our words come from → The section of a floodplain where deposits of fine silt and clay settle after a flood. Origin From back + swamp. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: swampswompswampsideswamplandslashpeatswampswalesloughwarpwashlandswadquagmire Back to today's word