impracticability

from WordNet (r) 3.0 (2006)

impracticability
    n 1: the quality of not being usable [syn: {impracticability},
         {impracticableness}] [ant: {practicability},
         {practicableness}]

from The Collaborative International Dictionary of English v.0.48

Impracticability \Im*prac`ti*ca*bil"i*ty\, n.; pl.
   {Impracticabilities}.
   1. The state or quality of being impracticable;
      infeasibility. --Goldsmith.
      [1913 Webster]

   2. An impracticable thing.
      [1913 Webster]

   3. Intractableness; stubbornness.
      [1913 Webster]