possessyoudaoicibaDictYouDict[possess 词源字典]
possess: [15] Latin potis ‘able, having power’ (source of English posse and potent) was combined with the verb sīdere ‘sit down’ (a relative of English sit) to form a new verb possīdere. This meant literally ‘sit down as the person in control’, hence by extension ‘take possession of’ and ultimately ‘have, own’. It passed into English via Old French possesser.
=> possible, potent, sit[possess etymology, possess origin, 英语词源]
possess (v.)youdaoicibaDictYouDict
late 14c., "to hold, occupy, reside in" (without regard to ownership), a back formation from possession and in part from Old French possesser "to have and hold, take, be in possession of" (mid-13c.), from Latin possess-, past participle stem of possidere "to have and hold, possess, be master of, own," from posse "to be able," from potis "able, powerful" (see potent) + esse "to be" (see be). Meaning "to hold as property" is recorded from c. 1500. Demonic sense is recorded from 1530s (implied in possessed). Related: Possessed; possessing.