carcer
carcer (kahr-s[schwa]r), n. [Latin “jail, prison”] Hist. A prison or jail, esp. one used to detain rather than punish. • Carcer, as used in English law and Roman law, usu. referred to a jail used as a place of detention during trial or after sentence pending execution, rather than as a place of punishment. The modern term incarceration derives from this word.