plenteous

Etymology

Comes from Middle English plentewos, plentevous, and other forms, dating to around 1300, from Old French plentiveus (“fertile, rich”) (early 13th century), from plentif (“abundant”), from plenté (“abundance”) (surviving as Modern French pleinté and English plenty), from Latin plenitatem, the accusative of plenitas (“fullness”), from plenus (“complete, full”), from Proto-Indo-European *pl̥h₁nós (“full”).