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Related to cheder: cheddar cheese
cheder(ˈxɛdɛr; English ˈheɪdə) or
n, pl chadarim (xadaˈriːm) or English cheders
1. (Judaism) (in Western countries) elementary religious education classes, usually outside normal school hours
2. (Judaism) (more traditionally) a full-time elementary religious school
3. (Judaism) informal a place of corrective instruction; prison
he•der(ˈxeɪ dər, ˈheɪ-)
(esp. formerly in E Europe) a private Jewish school for teaching young children the fundamentals of Judaism.
[1880–90; < Yiddish kheyder < Hebrew ḥedher literally, room]