1. under as in undercurrent   before   one, single   below   without   Hint Half-n-half Clue   2. proto as in prototype   with, joint   not   against   first   Half-n-half Clue   3. non as in nonentity   within   not   minute, small   involving change   Half-n-half Clue   4. circum as in circumspection   around   involving change   first   within   Half-n-half Clue   5. co as in coalesce   hatred   against   with, joint   without   Half-n-half Clue   6. contra as in contravene   against   hatred   involving change   with, joint   Half-n-half Clue   7. mega as in megalith   among, between   not   without   great, large, one million   Half-n-half Clue