1. drug or treatment preventing infection.   awl   extrapolation   chameleon   antiseptic   Hint Half-n-half Clue   2. sharp-edged tool used for cutting.   cerebration   fissure   centrifuge   chisel   Half-n-half Clue   3. wasting away.   decomposition   imbalance   atrophy   chassis   Half-n-half Clue   4. opening or gap.   aperture   immobility   flux   die   Half-n-half Clue   5. base framework of automobile or carriage.   fusion   chassis   effervescence   friction   Half-n-half Clue   6. opposite statement or position turned round.   acoustics   balm   consistency   converse   Half-n-half Clue   7. collarbone.   conduit   clavicle   cataract   effervescence   Half-n-half Clue