1.  tortuousness(n = noun.shape) contortion, crookedness, torsion, tortuosity - a tortuous and twisted shape or position; "they built a tree house in the tortuosities of its boughs"; "the acrobat performed incredible contortions"
is a kind of distorted shape, distortion
Derived form adjective tortuous₂

2.  tortuousness(n = noun.attribute) complicatedness, complication, knottiness - puzzling complexity;
is a kind of complexity, complexness
Derived forms adjective tortuous₃, adjective tortuous₁