useless

/ˈjusləs/
adjective
  1. Not having any good use; not helpful or effective.
    • It's useless trying to fix a broken phone with tape.
    • This old map is useless because the roads have changed.
    • He felt useless when he couldn't help his friend move the sofa.
Antonyms
What does "useless" mean? | whatsthatwordmean | whatsthatwordmean