Where does “rheubarbarum” come from?
rheubarbarum (Latin) comes from Koine Greek ῥῆον βάρβαρον, from Ancient Greek ῥῆον, from Middle Persian rēwand, from Middle Persian lypʾs, from Proto-Iranian (h)rabā́š, from Proto-Indo-Iranian (s)rabʰā́ćš, from Proto-Indo-Iranian -ā́ćš, from Proto-Indo-European -eḱés.
Ancestry of “rheubarbarum”, step by step
Words derived from “rheubarbarum”