role – n. the part someone has in a job, activity or performance
revitalize – v. make something more active or exciting
obesity – n. a condition of having by too much fat in the body
hierarchical – adj. system of organizing people or things based on importance
integration – n. the combination of two or more things
conversant – adj. being familiar with or having knowledge or
elegance – n. being graceful and stylish
ordinary – adj. common, not special or unusual
tremendous –adj. very good, excellent
overshadow – v. make someone or something less important or successful
learning curve – n. how fast or slowly someone can learn a new skill or activity