Definitions for knottiness
Random House Webster's College Dictionary
knot•tyˈnɒt i(adj.)-ti•er, -ti•est.
having or full of knots.
involved, intricate, or difficult.
Origin of knotty:
complicatedness, complication, knottiness, tortuousness(noun)
The state of being knotty.
the quality or state of being knotty or full of knots
difficulty of solution; intricacy; complication