| imperceptive(adjective, dull, careless, indifferent, thoughtless) |
| impercipient(adjective, inattentive, observant, unperceptive) |
| imprudent(careless, stupid, casual, rash, unthinking) |
| incautious(adjective, careless, indifferent, casual, sloppy) |
| incognizant(adjective, unaware) |
| inconscient(careless, remote, distracted, heedless, scatterbrained) |
| inconstant |
| indiscreet(adjective, indifferent, casual, thoughtless, sloppy) |
| indiscriminate(adjective, dull, careless, indifferent, thoughtless) |
| injudicious(adjective, careless, indifferent, foolish, stupid) |
| insensitive(adjective, dull, careless, indifferent, thoughtless) |
| irreflective(careless, stupid, rash, unthinking, obtuse) |
| lost(adjective, careless, indifferent, apathetic, remote) |
| mooning(careless, remote, distracted, heedless, scatterbrained) |
| moony(careless, remote, distracted, heedless, scatterbrained) |
| musing(noun, adjective, careless, indifferent, apathetic) |
| muzzy |
| myopic(adjective, dull, careless, indifferent, thoughtless) |
| nearsighted(adjective, dull, careless, indifferent, thoughtless) |
| nonadherent |