| ineffective(adjective, weak, inadequate, useless, inappropriate) |
| inelegant |
| ineligible(adjective, weak, inadequate, unfit, unqualified) |
| inept(adjective, weak, awkward, inadequate, unfit) |
| inexpedient(adjective, inadequate, useless, inappropriate, unhealthy) |
| inexpert(adjective, weak, inadequate, unfit, unqualified) |
| infelicitous(adjective, inadequate, useless, inappropriate, unhealthy) |
| ingenuous(adjective, simple, clean, raw, green) |
| inharmonious(adjective, inadequate, useless, inappropriate, unhealthy) |
| innocuous(adjective, kindly, ignorant, naive, unknowing) |
| innoxious(adjective, kindly, ignorant, naive, unknowing) |
| inobnoxious(adjective, kindly, ignorant, naive, unknowing) |
| inoffensive(adjective, kindly, ignorant, naive, unknowing) |
| inproficient(adjective, weak, awkward, inadequate, unfit) |
| insignificant |
| insufficient(adjective, weak, inadequate, unfit, unqualified) |
| invidious(adjective, nasty, terrible, disgusting, vicious) |
| irksome(adjective, dull, bad, nasty, horrible) |
| irritating(adjective, dull, boring, tired, tedious) |
| jading(adjective, dull, boring, tired, tedious) |