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