dependent
Independent
mature
Immature
convenient
Inconvenient
fortunate
Unfortunate
intelligent
Unintelligent
certain
Uncertain
necessary
Unnecessary
practical
Impractical
perfect
Imperfect
resistible
Irresistible
precise
Imprecise
appropriate
Inappropriate
conscious
Unconscious
Insufficient
sufficient
experienced
Inexperienced
legal
Illegal