| incapable(adjective, weak, skill, inadequate, feeble) |
| unfit(adjective, dull, weak, ability, flat) |
| ineffective(adjective, weak, inadequate, useless, incompetent) |
| incompetent(adjective, weak, ability, skill, awkward) |
| unqualified(adjective, weak, ability, skill, inadequate) |
| ineffectual(adjective, weak, skill, inadequate, limited) |
| powerless(adjective, weak, skill, inferior, inadequate) |
| impotent(adjective, weak, skill, inferior, inadequate) |
| inefficient(adjective, weak, skill, inadequate, limited) |
| inept(adjective, dull, weak, flat, slow) |
| inadequate(adjective, weak, skill, inferior, limited) |
| unfitted(adjective, skill, inadequate, useless, unfit) |
| disqualified(adjective, weak, inadequate, useless, incompetent) |
| helpless(adjective, weak, skill, awkward, inadequate) |
| disabled(adjective, useless, unfit, impotence) |
| inexpert(adjective, dull, weak, flat, slow) |
| unskilled(adjective, dull, weak, flat, slow) |
| weak(adjective, skill, inadequate, feeble, useless) |
| clumsy(adjective, dull, flat, slow, skill) |
| incapable of(adjective, useless, unfit) |