plenteous

From Middle English plentewos, plentevous, et al., circa 1300, from Old French plentiveus (“fertile, rich”) (early 13th century), from plentif (“abundant”), from plenté (“abundance”) (Modern French pleinté, English plenty), from Latin plenitatem, accusative of plenitas (“fullness”), from plenus (“complete, full”), from Proto-Indo-European *pl̥h₁nós (“full”).