| in disrepair |
| inappreciable(adjective, useless, unfit) |
| inappropriate(adjective, useless, unfit) |
| incapable of(adjective, useless, unfit) |
| incapacitated(adjective, useless, unfit) |
| inconsequential(adjective, poor, base, inferior, insignificant) |
| inefficacious(adjective, wild, unreasonable, useless, absurd) |
| ineligible(adjective, useless, unfit) |
| inferior(adjective, poor, base, insignificant, useless) |
| insignificant(adjective, poor, base, inferior, useless) |
| insufficient(adjective, useless, unfit) |
| irrelative(adjective, inapplicable) |
| irrelevant(adjective, inapplicable) |
| ivory-tower(adjective, wild, unreasonable, useless, absurd) |
| malfunctioning |
| mediocre(adjective, poor, base, inferior, insignificant) |
| miserable(adjective, poor, base, inferior, insignificant) |
| no-account(adjective, poor, base, inferior, insignificant) |
| no good(expression, adjective, weak, poor, base) |
| non-effective(adjective, useless, unfit) |