| inefficient(adjective, weak, inferior, affect, inadequate) |
| impracticable(adjective, wild, unreasonable, trivial, valuable) |
| inefficacious(adjective, wild, inferior, affect, inadequate) |
| purposeless(adjective, weak, value, insignificant, unimportant) |
| impractical(adjective, weak, unreasonable, trivial, valuable) |
| incompetent(adjective, weak, careless, stupid, inadequate) |
| unfit(adjective, appropriate, ready, inadequate, unable) |
| meaningless(adjective, weak, slight, lower, poor) |
| sterile(adjective, poor, base, inferior, insignificant) |
| feckless(adjective, value, insignificant, inadequate, limited) |
| inadequate(adjective, bad, weak, poor, unsuitable) |
| inept(adjective, weak, inferior, inadequate, limited) |
| inutile(adjective, weak, poor, base, inferior) |
| unserviceable(adjective, wild, unreasonable, absurd, impractical) |
| empty(adjective, poor, base, value, inferior) |
| good-for-nothing(adjective, weak, poor, base, careless) |
| nugatory(adjective, slight, lower, poor, base) |
| superfluous(adjective, waste, spare, extreme, extra) |
| unimportant(adjective, slight, lower, poor, base) |
| unnecessary(adjective, slight, lower, value, stupid) |