informant
🇺🇸
/ɪnˈfɔːrmənt/
🇬🇧
/ɪnˈfɔːmənt/
A person who secretly gives information to police or media.
The police informant provided crucial details about the crime.
警方线人提供了关于犯罪的关键细节。
A person who gives information for research or study.
The researcher interviewed an informant about local customs.
研究人员采访了一位信息提供者了解当地习俗。