1. drug that reduces pain.   astigmatism   anodyne   apothecary   extrapolation   Hint Half-n-half Clue   2. opening or gap.   conduit   delirium   aperture   emollient   Half-n-half Clue   3. reduction in size.   anemia   diminution   fulcrum   conduit   Half-n-half Clue   4. continuous flow or series of changes.   apothecary   contagion   flux   catalyst   Half-n-half Clue   5. exhalation affecting smell.   effluvium   contagion   cog   cataract   Half-n-half Clue   6. drug or treatment preventing infection.   foliage   antiseptic   fissure   apothecary   Half-n-half Clue   7. eye disorder leading to partial blindness; waterfall.   aphasia   cataract   humus   conjecture   Half-n-half Clue