/naɪt ˈmɑrʃəl ʌv ðə poʊst/ – Phrase
Definition: nhân chứng bị mua chuộc, người chứng gian.
A more thorough explanation: The legal English definition of the term “knight-marshal of the post” refers to an officer responsible for overseeing the security and protection of the mail service, particularly in historical contexts where knights were appointed to ensure the safe delivery of mail and protection of postal routes.
Example: The knight-marshal of the post is responsible for overseeing security and law enforcement within the designated area.