1. back, again   re as in recant   intra as in intravenous   con as in concomitant   post as in posthumous   Hint Half-n-half Clue   2. not   retro as in retrospective   para as in paragon   neo as in neophyte   in as in inchoate   Half-n-half Clue   3. after   post as in posthumous   pan as in panacea   retro as in retrospective   re as in recant   Half-n-half Clue   4. backward   arch as in archive   retro as in retrospective   neo as in neophyte   re as in recant   Half-n-half Clue   5. above, over   syn as in synthesis   per as in perennial   super as in superfluous   tele as in telekinesis   Half-n-half Clue   6. with, together   syn as in synthesis   tele as in telekinesis   pan as in panacea   arch as in archive   Half-n-half Clue   7. within   retro as in retrospective   pan as in panacea   intra as in intravenous   in as in inchoate   Half-n-half Clue