不成文 Save Sign in to save words bùchéngwén ㄅㄨˋ ㄔㄥˊ ㄨㄣˊ unwritten (rule) Character by character 不(bù)no 成(chéng)surname Cheng 文(wén)surname Wen Words with 不成文 Starting with 不成文 不成文法 A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0