Illogicality, illiterate, nonregular (irregular), irresistible, impossible, impatient, inactive, impenetrable (unpenetrable), inaccessible, inconvenience, uneven, uninteresting (disinterest), unhealthy, unpopular, unsuccessful, disapproved (unapproved), dishonesty, misunderstanding, unbelief (disbelief, misbelief), nonalcoholic.