unusefulness

/ʌnˈjusfəlnəs/
noun
  1. The quality or state of being not useful; lack of usefulness.
    • The unusefulness of the broken tool meant the repair job took twice as long.
    • The unusefulness of the old software became clear when it couldn't open modern files.
    • He complained about the unusefulness of the instructions, which left him confused.
Antonyms
What does "unusefulness" mean? | whatsthatwordmean | whatsthatwordmean