| impairment(noun, disadvantage, restriction, infirmity, frailty) |
| inadequateness(defect, deficiency, imperfection, inadequacy, shortage) |
| incapableness |
| incapacitation(noun, weakness, skill, failure, shortcoming) |
| incompatibility(inappropriateness, inaptness, unbecomingness) |
| incorrectness(noun, slip, rudeness, impropriety, tastelessness) |
| indecorousness(noun, impropriety, tastelessness, inappropriateness, unsuitability) |
| indecorum(noun, slip, rudeness, impropriety, tastelessness) |
| ineffectiveness(noun, weakness, skill, failure, lack) |
| ineffectuality(noun, weakness, hopelessness, inability, helplessness) |
| inexpediency |
| inutility(noun, weakness, skill, failure, shortcoming) |
| irrelevancy |
| powerlessness(noun, weakness, skill, failure, shortcoming) |
| untimeliness(noun, bother, disturbance, hindrance, impropriety) |
| uselessness(noun, weakness, hopelessness, inability, helplessness) |
| abnormality |
| ad lib |
| aggravation(bother, disturbance, hindrance, untimeliness, troublesomeness) |
| annoyance(bother, disturbance, hindrance, untimeliness, troublesomeness) |