abstruseness

from WordNet (r) 3.0 (2006)

abstruseness
    n 1: the quality of being unclear or abstruse and hard to
         understand [syn: {obscureness}, {obscurity},
         {abstruseness}, {reconditeness}] [ant: {clarity},
         {clearness}, {limpidity}, {lucidity}, {lucidness},
         {pellucidity}]
    2: wisdom that is recondite and abstruse and profound; "the
       anthropologist was impressed by the reconditeness of the
       native proverbs" [syn: {reconditeness}, {abstruseness},
       {abstrusity}, {profoundness}, {profundity}]

from The Collaborative International Dictionary of English v.0.48

Abstruseness \Ab*struse"ness\, n.
   The quality of being abstruse; difficulty of apprehension.
   --Boyle.
   [1913 Webster]