板上釘釘 bǎn shàng dìng dīng

DEFINITIONS

  1. that clinches it
  2. that's final
  3. no two ways about it

CHARACTERS

板 bǎn
HSK 3
plank, board; iron or tin plate
上 shàng
HSK 1
top; superior, highest; go up, send up
釘 dìng nail, spike; pursue closely
釘 dīng nail, spike; pursue closely