1. contiguous   two-year long or every two years.   next to or adjoining.   of a derived kind or obtained from another source.   based on experiment, not theory.   Hint Half-n-half Clue   2. humid   damp or moist.   related to embryo or undeveloped.   cancer-causing.   dangerous or risky.   Half-n-half Clue   3. diurnal   based on hypotheses or assumptions.   of the day or daily.   opposite or inverted in relation or order.   not able to penetrate or understand.   Half-n-half Clue   4. elliptical   shaped like an oval; ambiguous or baffling.   practicable or possible.   imbalanced or not similar about dividing line.   glowing with heat.   Half-n-half Clue   5. deducible   shapeless or lacking definition.   salty or saline.   flesh-eating.   inferred by reasoning; derived as conclusions.   Half-n-half Clue   6. brackish   salty or saline.   damp or moist.   flying or radiating from a center.   not able to penetrate or understand.   Half-n-half Clue   7. cognitive   based on hypotheses or assumptions.   of the day or daily.   implied but not expressed.   pertaining to mental processes or knowing.   Half-n-half Clue