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encourage - v. to make (someone) more likely to do something : to make (something) more appealing or more likely to happen
avert - v. to prevent (something bad) from happening
frowned upon - phrasal verb to disapprove of something
immune - adj. not capable of being affected by a disease
collaborate - v. to work with another person or group in order to achieve or do something : collaboration - n.
hormone - n. a natural substance that is produced in the body and that influences the way the body grows or develops
flexibility - n. capable of bending or being bent
