| unable(adjective, skill, inadequate, useless, unfit) |
| unapt(adjective, useless, incompetent, unfit, unqualified) |
| incompetent(adjective, weak, poor, inadequate, useless) |
| unqualified(adjective, weak, inadequate, useless, incompetent) |
| disqualified(verb, adjective, inadequate, useless, incompetent) |
| unfit(verb, adjective, hurt, weak, ruin) |
| incapable(adjective, weak, inadequate, useless, incompetent) |
| inept(weak, skill, inadequate, unfit, unqualified) |
| disabled(adjective, useless, unfit, impotence) |
| inapt |
| incapacitated(verb, adjective, weak, skill, useless) |
| ineffective(adjective, useless, unfit, impotence) |
| unsuitable(adjective, useless, unfit) |
| improper(adjective, useless, unfit) |
| inappropriate(adjective, useless, unfit) |
| inefficient(weak, inadequate, useless, unqualified, unable) |
| insufficient(adjective, inadequate, useless, unfit, deficient) |
| unequipped(adjective, awkward, inadequate, useless, bare) |
| inadequate(adjective, useless, unfit, unqualified, deficient) |
| unskillful(inadequate, useless, incompetent, unqualified, inept) |