| ill-chosen(adjective, wrong, poor, awkward, inappropriate) |
| ill-matched(adjective, wrong, improper, inappropriate, unfit) |
| impractical(adjective, useless, unfit) |
| ineffective(adjective, weak, inadequate, feeble, useless) |
| inharmonious(adjective, wrong, false, strange, proper) |
| intolerable(adjective, offensive, unpleasant, terrible, horrible) |
| misplaced(disagreement, irrelevant, unfitting, untimely) |
| uncongenial(adjective, disagreement, inadequate, useless, inappropriate) |
| unhappy(adjective, bad, poor, awkward, improper) |
| unlawful(adjective, wrong, improper, inappropriate, incorrect) |
| unmeet(adjective, dull, wrong, flat, slow) |
| unqualified(adjective, unfitted) |
| unsustainable |
| untenable(adjective, useless, unfit, unacceptable) |
| unworkable(adjective, useless) |
| useless(adjective, bad, poor, inadequate, useless) |
| abnormal(adjective, wrong, false, awkward, inadequate) |
| deficient(adjective, unacceptable) |
| delinquent(adjective, inexpedient) |
| different(adjective, wrong, irregular, improper, unqualified) |