- possible[possible 词源字典]
- possible:  Latin posse ‘be able’ (source of English posse) produced the derived adjective possibilis ‘that can be done’, which came into English via Old French possible. (Its antonym impossible reached English at roughly the same time.)
=> posse, potent[possible etymology, possible origin, 英语词源]
- possible (adj.)
- mid-14c., from Old French possible and directly from Latin possibilis "that can be done," from posse "be able" (see potent).
- possible (n.)
- 1640s, from possible (adj.).