资料来源 : Webster's Revised Unabridged Dictionary (1913)

Difficultness \Dif"fi*cult*ness\, n.
   Difficulty. [R.] --Golding.

资料来源 : WordNet®

difficultness
     n : the quality of being difficult; "they agreed about the
         difficulty of the climb" [syn: {difficulty}] [ant: {ease}]