Where does “reubarbe” come from?

reubarbe (Old French) comes from Late Latin reubarbarum, 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, from Proto-Indo-Iranian -ā́ćš.

Ancestry of “reubarbe”, step by step

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

Words derived from “reubarbe

Every word from Proto-Indo-European -eḱésEvery word from Proto-Indo-Iranian -ā́ćšEvery word from Proto-Indo-Iranian (s)rabʰā́ćš