English
superflood
From super- + flood.
Proto-Indo-European *pleh₃(w)- ‘to swim, flow’
Proto-Germanic *flōduz ‘river’
Proto-West Germanic *flōdu ‘river’
Old English flōd ‘flowing of the tide’
Middle English flod ‘a river; a waterbody that moves in one direction’
English flood
Today it means
noun A very large, devastating flood, especially one caused by the melting of a glacier-dammed lake.
Language periods are conventional ranges, not dates for this word.
Etymograph / superflood