deponent (adj.)youdaoicibaDictYouDict[deponent 词源字典]
1520s, originally grammatical (of verbs passive in form but active in sense), from Latin deponentem "putting down or aside," present participle of deponere (see deposit (v.)). Noun meaning "one who makes a deposition" is from 1540s.[deponent etymology, deponent origin, 英语词源]