1. unit for measuring weight of gems and purity of gold.   atrophy   carat   corollary   equilibrium   Hint Half-n-half Clue   2. degeneration; humiliation.   alchemy   degradation   fulcrum   galaxy   Half-n-half Clue   3. loss of speech.   decomposition   anemia   apogee   aphasia   Half-n-half Clue   4. drug or treatment preventing infection.   autopsy   imbalance   astigmatism   antiseptic   Half-n-half Clue   5. deviation from center or oddity.   conglomeration   eccentricity   die   dissection   Half-n-half Clue   6. parallelism or similarity.   immobility   conifer   analogy   arboretum   Half-n-half Clue   7. opening or gap.   immobility   aperture   balm   eddy   Half-n-half Clue