Root of the Week: CAP (Wednesday)

WEDNESDAY  Capable (adjective)

To be capable is to have the necessary traits or skills to accomplish something.  A capable plumber is able to unclog your drain.  Most electric cars are capable of driving a hundred miles or more on a single charge. 

If you add the negating prefix “in” to “capable,” you get the opposite: if you are incapable of eating just one potato chip, then potato-chip-resisting is a skill that you have not yet mastered.