1. increase toughness by gradual heat reduction.   assimilate   anneal   coalesce   dilute   Hint Half-n-half Clue   2. calculate or reckon.   chisel   compute   cauterize   impede   Half-n-half Clue   3. propel or force onward.   disseminate   decipher   dissipate   impel   Half-n-half Clue   4. decode an encrypted message or make out.   decipher   dilute   coagulate   compute   Half-n-half Clue   5. hinder or retard.   eclipse   dilute   burgeon   impede   Half-n-half Clue   6. dry up by removing moisture.   desiccate   decelerate   ignite   dilute   Half-n-half Clue   7. thicken or change from fluid to solid state.   impede   coagulate   germinate   decant   Half-n-half Clue