/kənˈtjuːmeɪʃəs ˈwɪtnəs/ – Phrase
Definition: nhân chứng bướng bỉnh, nhân chứng không ra hầu tòa.
A more thorough explanation: A contumacious witness is a person who, after being properly summoned to testify in a legal proceeding, willfully refuses to comply with the court’s orders or instructions, or otherwise acts in a disobedient or defiant manner towards the court.
Example: The contumacious witness repeatedly refused to answer questions during the court proceedings, despite being ordered to do so by the judge.