From Middle English scisme, from Old French cisme or scisme, from Ancient Greek σχίσμα (skhísma, “division”), from σχίζω (skhízō, “I split”). Doublet of schisma. Compare chasm. This word was historically pronounced /ˈsɪzəm/ (and still is among the clergy); the pronunciations /ˈʃɪzəm/, /ˈskɪzəm/ are due to the spelling (the latter may have been reinforced by learned influence); compare schedule.