exploit {Ans: (v.) to make use of, develop; to make improper use of for personal profit; (n.) a feat, deed}extemporaneous {Ans: (adj.) made or delivered on the spur of the moment}venomous {Ans: (adj.) poisonous; spiteful, mean}impair {Ans: (v.) to make imperfect, damage, harm}divulge {Ans: (v.) to tell, reveal; to make public}appreciable {Ans: (adj.) sufficient to be noticed or measured}