endurance – n. the ability to continue an activity for a long period
toxic – adj. containing or being poisonous material
flammable – adj. capable of being easily lit and of burning quickly
cardiovascular – adj. of, relating to, or involving the heart and blood vessels
probe – n. an usually small object that is inserted into something so as to test conditions at a given point
initial – adj. of or relating to the beginning
sprout – n. to send out new growth
past its prime – figure of speech beyond the most useful or productive period
antioxidant – n. a substance that limits oxidation or chemical reactions caused by oxygen, peroxides, or free radicals