nenuphar
A water lily, especially the European white water lily (Nymphaea alba) or the yellow water lily (Nuphar lutea).
We'll try the «lunar waltz» while floats afar / Upon the liquid night — night's nenuphar.
Where it comes from
From Medieval Latin nenuphar, from Arabic نِلُوفَر (nilūfar), نِينُوفَر (nīnūfar), from Middle Persian nylw(k)pl (nīlōpal, “lotus, water-lily”), from Sanskrit नीलोत्पल (nīlotpala, “blue lotus”), from नील (nīla, “blue”) + उत्पल (utpala, “lotus, water-lily”). Compare French nénufar.
Adapted from the Wiktionary entry nenuphar (CC BY-SA 4.0).