1. a person who reveals the true identity or nature of someone or something

Examples

• The journalist became known as an unmasker of corrupt politicians.
• She was the unmasker who revealed the fraud behind the charity.
• The detective served as the unmasker of the criminal’s true identity.
• As an unmasker of fake news, he helped people identify reliable sources.
• The whistleblower acted as an unmasker of corporate wrongdoing.
• The investigative reporter was a skilled unmasker of hidden scandals.