不言自明 bù yán zì míng

DEFINITIONS

  1. self-evident; needing no explanation (idiom)

CHARACTERS

不 bù
HSK 1
no, not; un-; negative prefix
言 yán
HSK 4
words, speech; speak, say
自 zì
HSK 3
self, private, personal; from
明 míng
HSK 1
bright, light, brilliant; clear