/tə ɪmˈpjuːn ðə ˈkærɪktər ʌv ə ˈwɪtnəs/ – Phrase
Definition: đặt vấn đề nghi ngờ nhân cách của nhân chứng.
A more thorough explanation: To impugn the character of a witness means to challenge or question the credibility, honesty, or integrity of the witness in a legal proceeding. This can involve casting doubt on the witness’s truthfulness, reliability, or moral character in an attempt to undermine their testimony or credibility.
Example: The defense attorney attempted to impugn the character of the witness by presenting evidence of their prior criminal convictions.