1. retro as in retrospective   not   within   related, beyond   backward   Hint Half-n-half Clue   2. super as in superfluous   above, over   related, beyond   chief, main, first   within   Half-n-half Clue   3. per as in perennial   through, complete   with, together   within   backward   Half-n-half Clue   4. syn as in synthesis   backward   back, again   meet, with, together   with, together   Half-n-half Clue   5. tele as in telekinesis   within   related, beyond   far, distant   all, whole   Half-n-half Clue   6. ob as in obloquy   chief, main, first   new   all, whole   against   Half-n-half Clue   7. arch as in archive   chief, main, first   with, together   within   not   Half-n-half Clue