英语词源字典 - 在线词源网站

post-[post- 词源字典]: word-forming element meaning "after," from Latin post "behind, after, afterward," from *pos-ti (cognates: Arcadian pos, Doric poti "toward, to, near, close by;" Old Church Slavonic po "behind, after," pozdu "late;" Lithuanian pas "at, by"), from PIE *apo- (cognates: Greek apo "from," Latin ab "away from" see apo-).[post- etymology, post- origin, 英语词源]
repose (v.2): "put, place," mid-15c., from Latin repos-, stem of reponere "put back, set back, replace, restore; put away, lay out, stretch out," from re- "back, away" (see re-) + ponere "to put, place" (past participle positus; see position (n.)). Or perhaps [Klein] formed in Middle English from Old French poser, on model of disposen "dispose."
stiff (adj.): Old English stif "rigid, inflexible," from Proto-Germanic *stifaz "inflexible" (cognates: Dutch stijf, Old High German stif, German steif "stiff;" Old Norse stifla "choke"), from PIE *stipos-, from root *steip- "press together, pack, cram" (cognates: Sanskrit styayate "coagulates," stima "slow;" Greek stia, stion "small stone," steibo "press together;" Latin stipare "pack down, press," stipes "post, tree trunk;" Lithuanian stipti "stiffen," stiprus "strong;" Old Church Slavonic stena "wall"). Of battles and competitions, from mid-13c.; of liquor, from 1813. To keep a stiff upper lip is attested from 1815. Related: Stiffly.