Where does “arpa” come from?
arpa (Turkish) comes from Ottoman Turkish آرپه, from Proto-Turkic arpa, from Proto-Iranian arpacyaH, from Proto-Iranian Hr̥pā́š ~ Hr̥pacáh, from Proto-Indo-Iranian Hr̥pā́ćš ~ Hr̥paćás, from Proto-Indo-Iranian -ā́ćš, from Proto-Indo-European -eḱés.
arpa (Turkish): barley
Ancestry of “arpa”, step by step