a witness whose relationship to the opposing party is such that his or her testimony may be prejudiced against the opposing party;
"a hostile witness can be asked leading questions and cross-examined"
When adverse publicity is equivalent to a formal accusation of criminal wrongdoing, due process may compel the agency to allow the accused some opportunity to present evidence and cross-examine adverse witnesses. 当不利公开宣传相当于刑事犯罪的正式指控时，正当程序会迫使机关为被指控者提供出示证据及盘问对方证人的机会。
He held an opinion quite adverse to Comrade Wang's. 他和王同志持绝然相反的意见。
The criminal disposed of the witness to the crime. 罪犯将他犯罪的目击者杀死了。
I have reliance in the testimony of the witness. 我相信证人的证词。
The development was adverse to our interests. 这种发展与我们的利益背道而驰。
State the fact in witness of his guilt. 叙述事实以证明的他的罪状。