convalescence (n.)youdaoicibaDictYouDict[convalescence 词源字典]
late 15c., from Middle French convalescence (15c.), from Late Latin convalescentia "regaining of health," from convalescentem (nominative convalescens), present participle of convalescere (see convalesce).[convalescence etymology, convalescence origin, 英语词源]