| ignorant(adjective, unconcerned, naive, unconscious, heedless) |
| imprudent(silly, foolish, rash, unwise, oblivious) |
| in a daze(expression, adjective, idiom, unconcerned, ignorant) |
| in the dark(expression, idiom, ignorant, unaware, uneducated) |
| inadequate(useless, inept, unable, unskilled, unskillful) |
| inadvertent(adjective, careless, indifferent, apathetic, thoughtless) |
| inane(dull, silly, foolish, unwise, unintelligent) |
| incapable(inadequate, useless, inept, unable, unskilled) |
| incognizant(adjective, unconcerned, ignorant, unconscious, heedless) |
| incompetent(adjective, useless, inept, unable, unskilled) |
| inconscient(careless, remote, distracted, heedless, woolgathering) |
| inconversant(adjective, unconcerned, ignorant, unconscious, heedless) |
| indifferent(adjective, careless, apathetic, distracted, negligent) |
| ineffectual(inadequate, useless, inept, unable, unskilled) |
| inefficient(inadequate, useless, inept, unable, unskilled) |
| ineligible(inadequate, useless, inept, unable, unskilled) |
| inept(inadequate, useless, unable, unskilled, unskillful) |
| inexperienced(inadequate, useless, inept, unable, unskilled) |
| inexpert(inadequate, useless, inept, unable, unskilled) |
| inobservant(adjective, careless, indifferent, apathetic, distracted) |