/tɛˈstɪfɪˌkeɪtə/ – noun
Definition: nhân chứng, người làm chứng.
A more thorough explanation: Testificator refers to a person who testifies or serves as a witness in a legal proceeding. The term was historically used to denote someone who provides testimony under oath in a court of law.
Example: The testificator was called to the stand to provide evidence in the court case.