1. pertaining to extracting and processing metals.   metallurgical   lunar   random   visceral   Hint Half-n-half Clue   2. used as preventive for spread of disease.   transient   synchronous   stratified   prophylactic   Half-n-half Clue   3. evaporating rapidly or highly explosive.   lateral   ligneous   volatile   rarefied   Half-n-half Clue   4. putrid or causing putrefaction.   translucent   unique   septic   tensile   Half-n-half Clue   5. pertaining to poison.   resilient   toxic   optimum   lateral   Half-n-half Clue   6. shining and shedding light.   quiescent   luminous   unique   seismic   Half-n-half Clue   7. muddy or not clear.   stellar   precipitate   ventral   turbid   Half-n-half Clue