1. produced by fire or volcanic action.   determinate   derivative   igneous   hypothetical   Hint Half-n-half Clue   2. can catch fire or burn easily.   combustible   aromatic   graduated   inevitable   Half-n-half Clue   3. inferred by reasoning; derived as conclusions.   astral   deducible   dynamic   impenetrable   Half-n-half Clue   4. of same kind or uniform.   hazardous   chronic   homogeneous   inverse   Half-n-half Clue   5. based on experiment, not theory.   heterodox   feasible   heterogenous   empirical   Half-n-half Clue   6. having a fixed order or nature.   chronic   inverse   cerebral   determinate   Half-n-half Clue   7. breakable or fragile.   congruent   corrosive   brittle   abrasive   Half-n-half Clue