1. leading to absence of pain.   carnivorous   biennial   analgesic   inevitable   Hint Half-n-half Clue   2. can float; light or cheerful.   eugenic   asymmetric   contiguous   buoyant   Half-n-half Clue   3. cold like ice.   glacial   carnivorous   buoyant   diffuse   Half-n-half Clue   4. unavoidable or bound to occur.   inevitable   integral   asymmetric   dynamic   Half-n-half Clue   5. impervious or unpassable.   impermeable   concentric   immune   astronomical   Half-n-half Clue   6. having common center.   dorsal   concentric   impenetrable   centripetal   Half-n-half Clue   7. that corrodes or burns; biting or sarcastic.   calorific   caustic   incandescent   abrasive   Half-n-half Clue