/kənˈfɪdənʃəl sɔrs/ – Phrase
Definition: nguồn bí mật.
A more thorough explanation: A confidential source is a person who provides information to a journalist or other individual on the condition that their identity will not be disclosed to the public or to authorities. This information is typically provided in confidence and is intended to be kept secret in order to protect the source from potential harm or retaliation.
Example: The journalist promised to protect the identity of her confidential source in order to maintain the integrity of the investigation.