[Hungarian csárdás, from csárda, wayside tavern, from Serbo-Croatian čardāk, watchtower, from Ottoman Turkish čārṭāk, čardak, hut, pergola (equivalent to modern Turkish çardak), from Persian chār ṭāq, from chahār ṭāq, four-cornered vault : chahār, four (from Old Iranian cathwārō; see k^wetwer- in the Appendix of Indo-European roots) + ṭāq, vault (from Arabic, arch; see ṭwq in the Appendix of Semitic roots).]