Etymology

From Proto-Indo-European *(sm̥-)ǵʰéslo-. Indo-Iranian cognates include Pashto زر ‎(zër), Persian هزار ‎(hezâr), Kurdish ههزار ‎(hazār) and Sanskrit सहस्र ‎(sa-hásra). Akin to Old Armenian հազար ‎(hazar), an Iranian borrowing.