| dishonorable(unfit, worthless, unworthy, undeserving) |
| disreputable(adjective, unfit, worthless, unworthy, undeserving) |
| dissident(adjective, inadequate, disagreeable, senseless, inappropriate) |
| disused(adjective, useless, unfit) |
| dull(adjective, useless, unfit) |
| faulty(adjective, useless, unfit) |
| feeble(adjective, weak, inadequate, useless, unfit) |
| floundering(inadequate, useless, inept, unable, unskilled) |
| good for nothing(adjective, useless, unfit) |
| helpless(inadequate, useless, inept, unable, unskilled) |
| ignoble(adjective, unfit, worthless, unworthy, undeserving) |
| ill-equipped(adjective, inadequate, useless, unqualified, inexpert) |
| illegal |
| impermissible |
| impotent(adjective, weak, inadequate, incompetent, unfit) |
| impracticable(adjective, useless, unfit) |
| impractical(adjective, useless, unfit) |
| inadaptable(adjective, useless, unfit) |
| inappreciable(adjective, useless, unfit) |
| incapable of(adjective, useless, unfit) |