Where does “Rhabarber” come from?

Rhabarber (German) comes from Italian rabarbaro, from Latin rhabarbarum, from Koine Greek ῥῆον βαρβαρικόν, from Ancient Greek ῥῆον, from Middle Persian rēwand, from Middle Persian lypʾs, from Proto-Iranian (h)rabā́š, from Proto-Indo-Iranian (s)rabʰā́ćš.

Ancestry of “Rhabarber”, step by step

StepLanguageWordMeaning
1Italianrabarbarorhubarb (Rheum rhabarbarum)
2Latinrhabarbarumrhubarb
3Koine Greekῥῆον βαρβαρικόν—
4Ancient Greekῥῆονrhubarb
5Middle Persianrēwand—
6Middle Persianlypʾsrhubarb
7Proto-Iranian(h)rabā́šrhubarb; fennel
8Proto-Indo-Iranian(s)rabʰā́ćš—
9Proto-Indo-Iranian-ā́ćšanimal and plant suffix
10Proto-Indo-European-eḱés—

Words derived from “Rhabarber”

Every word from Proto-Indo-European -eḱés →Every word from Proto-Indo-Iranian -ā́ćš →Every word from Proto-Indo-Iranian (s)rabʰā́ćš →