1. smelt   melt ores for extraction of metal.   place one thing over another.   chew repeatedly or meditate upon.   harden into bone or become rigid.   Hint Half-n-half Clue   2. integrate   hasten or throw headlong down.   complete or form into whole.   reverse in relation or order.   make pulp by chewing.   Half-n-half Clue   3. interpolate   interject or insert between.   model, feign or pretend.   reverse in relation or order.   hasten or throw headlong down.   Half-n-half Clue   4. polarize   lay down as basis or truth.   introduce into a larger body or unite.   make valid or confirm.   split into two opposite groups.   Half-n-half Clue   5. invalidate   examine carefully or explore with instruments.   produce or deposit (eggs).   make invalid or weaken.   hypnotize.   Half-n-half Clue   6. incorporate   introduce into a larger body or unite.   soak in some medium till saturated.   harden into bone or become rigid.   make pulp by chewing.   Half-n-half Clue   7. sap   remove unwanted stuff; purify or cleanse.   crush to powder or dust; demolish.   exhaust vigor of or undermine.   split into two opposite groups.   Half-n-half Clue