Something such as a book that is unwritten has not been printed or written down.
双语例句
例：
Universal has agreed to pay $5 million for Grisham's next, as yet unwritten, novel.
环球公司已同意为哈里森姆还未动笔的下一部小说支付500万美元。
2.?不成文的
An unwritten rule, law, or agreement is one that is understood and accepted by everyone, although it may not have been formally or officially established.
双语例句
例：
They obey the one unwritten rule that binds them all – no talking.