Where does “rok” come from?

rok (Dutch) comes from Middle Dutch roc, from Old French roc, from Arabic رُخّ, from Persian رخ, from Middle Persian lhw', from Sanskrit रथ, from Proto-Indo-Iranian Hrátʰas, from Proto-Indo-European Hrót-h₂-os — to roll; wheel; to run, roll.

rok (Dutch): skirt; full dress, white tie; Alternative form of...