possibility (n.)youdaoicibaDictYouDict[possibility 词源字典]
late 14c., "condition of being possible," from Old French possibilité (13c.) and directly from Latin possibilitatem (nom. possibilitas) "possibility," from possibilis (see possible (adj.)). Meaning "a possible thing or substance" is from c. 1400. Related: Possibilities.[possibility etymology, possibility origin, 英语词源]