1. 形容詞
   沒寫下的, 沒記錄的
   未成文的
   口頭的
   沒寫字的
   空白的
   

   同義字詞
   nuncupative,oral,spoken,verbal,viva voce,word-of-mouth
   

例句

1. That's the unwritten rule.
2. There are unwritten rules in sport.
3. And lets never forget the unwritten rule.
4. There is an unwritten rule in their crowd.
5. But not for Bush is the unwritten sub-title.
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