不由分說 bù yóu fēn shuō

DEFINITIONS

  1. to allow no explanation

CHARACTERS

不 bù
HSK 1
no, not; un-; negative prefix
由 yóu
HSK 4
cause, reason; from
分 fēn
HSK 1
divide; small unit of time etc.
說 shuō speak, say, talk; scold, upbraid