mid-15c., "of or pertaining to a cloister, monastic," from Middle French claustral (15c.) and directly from Medieval Latin claustralis "pertaining to a claustrum" (see cloister). From 1862 as "resembling a cloister."
Claudia
claudication
Claudius
clausal
clause
claustral
claustration
claustrophilia
claustrophobia
claustrophobic
claves