ci-devant
adjective
attrib.
- from or in an earlier time (used to indicate that someone or something once possessed a specified characteristic but no longer does so)［用于表示某人、某物曾有但现已丧失的某种特性］以前的：
her ci-devant pupil, now her lover.
她的昔日学生, 今日情人。
词源
French, 'heretofore'.