| inexperienced(adjective, dull, weak, flat, slow) |
| inexpert(adjective, dull, weak, flat, slow) |
| inproficient(adjective, weak, inadequate, unfit, unqualified) |
| intrusive |
| inutile(adjective, useless, unfit) |
| invalid(adjective, useless, unfit) |
| irreconcilable(adjective, strange, fantastic, irregular, improper) |
| irreducible |
| irregular(wrong, false, strange, awkward, improper) |
| jarring(adjective, inadequate, inappropriate, antagonistic, unsuitable) |
| jejune |
| kaput(adjective, useless, unfit) |
| laid low(expression, inadequate, inappropriate, unhealthy, unsuitable) |
| losing(adjective, weak, inadequate, unfit, unqualified) |
| ludicrous(adjective, wrong, false, awkward, inadequate) |
| mal |
| maladjusted |
| maladroit(dull, flat, slow, improper, incorrect) |
| malcontented(adjective, unhappy, unpleasant, woe, BA) |
| marching to a different drummer(expression, adjective, idiom, inappropriate, antagonistic) |