不成文 bù chéng wén

unwritten (rule)

Word data

HSK Not in HSK
Frequency Unknown

Definitions

  1. 1. unwritten (rule)

Characters

Character Meaning
不 bù HSK 1
not; no; (negative prefix)
成 chéng HSK 3
to become; to succeed; to complete
文 wén HSK 3
writing; culture; language