Deepness

from WordNet (r) 3.0 (2006)

deepness
    n 1: the intellectual ability to penetrate deeply into ideas
         [syn: {astuteness}, {profundity}, {profoundness}, {depth},
         {deepness}]
    2: the quality of being physically deep; "the profundity of the
       mine was almost a mile" [syn: {deepness}, {profundity},
       {profoundness}] [ant: {shallowness}]
    3: the extent downward or backward or inward; "the depth of the
       water"; "depth of a shelf"; "depth of a closet" [syn:
       {depth}, {deepness}]
    4: a low pitch that is loud and voluminous

from The Collaborative International Dictionary of English v.0.48

Deepness \Deep"ness\, n.
   1. The state or quality of being deep, profound, mysterious,
      secretive, etc.; depth; profundity; -- opposed to
      shallowness.
      [1913 Webster]

            Because they had no deepness of earth. --Matt. xiii.
                                                  5.
      [1913 Webster]

   2. Craft; insidiousness. [R.] --J. Gregory.
      [1913 Webster]