noun (n)

• unskillfulness resulting from a lack of training(noun.cognition)

  Synonym:
  awkwardness, clumsiness, ineptitude, maladroitness, slowness
  

  source: wordnet30
• the quality of having the wrong properties for a specific purpose(noun.attribute)

  Synonym:
  unsuitability, unsuitableness
  Antonym:
  suitability, suitableness
  

  source: wordnet30
• Unfitness; ineptitude.(noun)

  source: webster1913