/dɪˈnʌnsieɪtə/ – noun
Definition: 1. người buộc tội, người vạch mặt;
2. người tố giác, người tố cáo.
A more thorough explanation: A denunciator is a person who makes a formal or public accusation or complaint against someone, typically to a legal or authoritative body, alleging wrongdoing or misconduct.
Example: The denunciator provided detailed information to the authorities regarding the fraudulent activities of the company.