depart: [13] Depart originally meant ‘divide’. This was the sense of its ultimate Latin ancestor dispertīre, literally ‘separate up into constituent parts’, a compound verb formed from the prefix dis-, denoting separation, and partīre ‘divide, distribute’, a derivative of the noun pars ‘part’. It passed into English via Vulgar Latin *dēpartīre and Old French departir, by which time the notions of ‘division’ and ‘separation’ had already produced the intransitive sense ‘go away’. => part[depart etymology, depart origin, 英语词源]