cheder in British English
or heder Hebrew (ˈxɛdɛr, English ˈheɪdə)
nounWord forms: plural chadarim (xadaˈriːm) or English cheders Judaism1. (in Western countries) elementary religious education classes, usually outside normal school hours
2. (more traditionally) a full-time elementary religious school
3. informal a place of corrective instruction; prison
Word origin
literally: room