入木三分 rù mù sān fēn

DEFINITIONS

  1. written in a forceful hand
  2. penetrating
  3. profound

CHARACTERS

入 rù
HSK 4
enter, come in(to), join
木 mù
HSK 5
tree; wood, lumber; wooden
三 sān
HSK 1
three
分 fēn
HSK 1
divide; small unit of time etc.