/ʌnˈrɪtən/ – adjective
Definition: không được viết ra, không thành văn.
A more thorough explanation: In a legal context, the term “unwritten” refers to something that is not formally documented or recorded in writing, but may still be recognized or established through custom, tradition, or practice. It can refer to laws, rules, agreements, or principles that are not written down in official statutes or documents, but are understood and followed based on common understanding or historical precedent.
Example: The unwritten agreement between the parties was not enforceable in court.