existence (n.)youdaoicibaDictYouDict[existence 词源字典]
late 14c., "reality," from Old French existence, from Medieval Latin existentia/exsistentia, from existentem/exsistentem (nominative existens/exsistens) "existent," present participle of Latin existere/exsistere "stand forth, come out, emerge; appear, be visible, come to light; arise, be produced; turn into," and, as a secondary meaning, "exist, be;" from ex- "forth" (see ex-) + sistere "cause to stand" (see assist).[existence etymology, existence origin, 英语词源]