死結難解 sǐ jié nán jiě

DEFINITIONS

  1. enigmatic knot hard to untie (idiom); thorny problem
  2. intractable difficulty

CHARACTERS

死 sǐ
HSK 4
die; dead; death
結 jié knot, tie; join, connect
難 nán difficult, arduous, hard; unable
解 jiě
HSK 3
loosen, unfasten, untie; explain