/ˌtɛstɪˈməʊniəli/ – adverb
Definition: với tư cách là nhân chứng, làm lời chứng.
A more throughout explanation: Testimonially refers to something that is done or given as a testimony or evidence in a legal proceeding. It can include written or oral statements provided under oath or affirmation to support a claim or to establish facts in a court of law.
Example: The witness testified testimonially about the events leading up to the accident.