floodplain
UK[ˈflʌdpleɪn]US[ˈflʌdpleɪn]
n
a flat area of land next to a river that is often flooded when the river becomes too full.
n
(geology) the part of a river valley that is made of river sediments and is covered by water during a flood.
Morpheme Breakdown
flood
plain
flood
noun
plain
noun
Etymology
the word 'floodplain' is a modern english compound, transparently combining two ancient roots to describe a specific geographical feature. the first element, 'flood', originates from proto-germanic flōduz, itself from the pie root pleu- meaning 'to flow, to swim', which captures the dynamic, overflowing action of water. the second element, 'plain', derives from latin plānum ('flat, level surface'), from the pie root pele- meaning 'flat, to spread'. the compound logically fuses these concepts: it is the flat, level land (plain) that is subject to or formed by the action of flowing, overflowing water (flood). this construction directly links the observable process of periodic inundation with the resulting physical landscape.
Analysis
Structure: flood (noun) + plain (noun)
flood (from old english flōd, meaning 'a flowing of water, tide, an overflowing of water, deluge', functioning as the modifying element). plain (from latin plānum, meaning 'level ground, a plain', functioning as the core noun element).
Examples
after the heavy rains, the river burst its banks and inundated the entire floodplain.
farmers have historically valued floodplains for their fertile, nutrient-rich soil.
new building regulations restrict construction on the floodplain to mitigate potential damage.