English to English

noun (n)

• the quality of having no practical use(noun.attribute)

  Synonym:
  unusefulness, uselessness
  Antonym:
  usefulness, utility
  

  source: wordnet30
• Uselessness; the quality of being unprofitable; unprofitableness; as, the inutility of vain speculations and visionary projects.(noun)

  source: webster1913