whistle-blower
UK: ˈwɪsəlˌbləʊə | US: ˈwɪsəlˌbloʊər
n. a person who exposes secretive or unethical activities within an organization, typically to the public or authorities.
The term "whistle-blower" originated in the mid-20th century, combining "whistle" (a device used to alert or signal) and "blower" (one who blows air). Metaphorically, it refers to someone who "blows the whistle" to draw attention to wrongdoing, much like a referee uses a whistle to stop play for a foul. The word reflects a vivid action-based analogy, emphasizing the act of revealing hidden misconduct.
The whistle-blower leaked documents proving corporate fraud.
Protecting whistle-blowers is essential for maintaining transparency.
She became a whistle-blower after witnessing illegal dumping by her employer.
The government enacted laws to shield whistle-blowers from retaliation.
His reputation as a whistle-blower earned him both praise and criticism.