1. inert or at rest.   osseous   rigid   quiescent   schematic   Hint Half-n-half Clue   2. pertaining to theory; not practical or applied.   quiescent   somatic   permeable   theoretical   Half-n-half Clue   3. caustic or sharp in taste or smell.   tertiary   precise   pungent   rarefied   Half-n-half Clue   4. pertaining to the sense of touch.   prehensile   tactile   septic   synchronous   Half-n-half Clue   5. artificial or produced by synthesis.   opalescent   lateral   pungent   synthetic   Half-n-half Clue   6. pertaining to poison.   saccharine   transient   redundant   toxic   Half-n-half Clue   7. small enough or unimportant as to be neglected.   negligible   stagnant   lateral   unique   Half-n-half Clue