The story
- Proto-Indo-Iranian · derived from*SáraswatiH
- Proto-Iranian · derived from*hárahwatiH
- Ancient Greek · derived fromἈραχωσία
- Latin · borrowed fromArachōsia
- English todayArachosia
From Latin Arachōsia, from Ancient Greek Ἀραχωσία (Arakhōsía), a borrowing from the Iranian language of that region; ultimately from Proto-Iranian *hárahwatiH, from Proto-Indo-Iranian *SáraswatiH. Compare the Old Persian name of the place: 𐏃𐎼𐎢𐎺𐎫𐎡𐏁 (h-r-u-v-t-i-š /harauvatiš/, literally “rich in waters/lakes”).
Etymology from Wiktionary, CC BY-SA 4.0.