/ˈlɔːfəl ˈwɪtnəs/ – Phrase
Definition: 1. người có quyền làm nhân chứng;
2. chứng cứ có thể chấp nhận được, chứng cứ hợp pháp.
A more thorough explanation: A lawful witness is an individual who is legally qualified and permitted to provide testimony or evidence in a court of law. This typically includes individuals who are of sound mind, have reached the age of majority, and are not otherwise disqualified by law from serving as a witness.
Example: The lawful witness provided testimony in court regarding the events that occurred on the night of the crime.