1. sound or logically convincing.   valid   tertiary   pungent   serrated   Hint Half-n-half Clue   2. pertaining to the earth.   metallurgical   terrestrial   theoretical   translucent   Half-n-half Clue   3. permeable or having pores.   tensile   putrid   porous   rigid   Half-n-half Clue   4. slanting or indirect.   stratified   soluble   oblique   unique   Half-n-half Clue   5. capable of being shaped by hammering or pliable.   somatic   schematic   multiform   malleable   Half-n-half Clue   6. (of gas or air) of less density.   redundant   resilient   theoretical   rarefied   Half-n-half Clue   7. pertaining to the abdomen.   iridescent   ventral   negligible   osseous   Half-n-half Clue