From Proto-Mongolic *cexeji, cognate with Mongolian цээж (ceež) and Buryat сээж (seež).
чееҗ • (çeej) (Clear script spelling ᡔᡄᡃᠴᡅ (cēji) or ᡒᡄᡃᡓᡅ (čēǰi))