advocate – n. a person who argues for or supports a cause or policy : a person who works for a cause or group

ambitious – n. having ambition : having a desire to be successful, powerful, or famous

antiretroviral – n. medical : acting, used, or effective against retroviruses

invigorate – v. to give life and energy to (someone) : reinvigorate to put life and energy back into (someone)

apartheid – n. a former social system in South Africa in which black people and people from other racial groups did not have the same political and economic rights as white people and were forced to live separately from white people

call to action – n. something such as a speech, piece of writing, or act that encourages people to take action about a problem
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