Crossword Clue:

The quality of being difficult to understand

AnswerCrossword Clue
DEEPDifficult to understand
SUBTLEDifficult to understand
ARCANEDifficult to understand
ESOTERICDifficult to understand
REREADTry to better understand, as difficult prose
SIMPLEASABCNot even close to being difficult