From Ottoman Turkish چرخ (çark, “wheel; machine”), from Persian چرخ (čarx), from Middle Persian 𐫝𐫍𐫡 (chr /čahr/, “wheel, cycle”), from Proto-Iranian *čaxrám, from Proto-Indo-Iranian *čakrám, from Proto-Indo-European *kʷékʷlos (“wheel, circle”). Doublet of çakra.