cheerleader
UK: ˈtʃɪəliːdə | US: ˈtʃɪrliːdər
n. a person who leads cheers and encourages enthusiasm, especially at sports events
n. (figuratively) a vocal supporter or promoter of a cause or idea
The word "cheerleader" combines "cheer" (from Old English cēr, meaning "face" or "expression," later evolving to denote shouts of encouragement) and "leader" (from Old English lǣdan, meaning "to guide"). The term emerged in the late 19th century in the U.S., originally referring to individuals who led organized cheers at sporting events. Over time, it gained metaphorical use for enthusiastic advocates of any cause.
She became the school's head cheerleader, rallying the crowd at every football game.
The politician’s most vocal cheerleaders campaigned tirelessly for his policies.
Without her energy, the team lacked a natural cheerleader to boost morale.
Corporate cheerleaders often overlook the downsides of rapid expansion.
His role as a cheerleader for environmental reform earned him widespread respect.