inattentive (adj.)
- apathetic
- artless
- ataractic
- blase
- careless
- casual
- derelict
- devil-may-care
- disinterested
- dispassionate
- distracted
- distrait
- distraught
- easygoing
- heedless
- inadvertent
- inapt
- inconstant
- incurious
- indifferent
- inefficient
- inept
- inexpert
- insouciant
- lackadaisical
- laissez-faire
- lax
- listless
- loose
- mediocre
- mindless
- neglectful
- negligent
- nonchalant
- noncompliant
- nonconforming
- nonobservant
- nonrestrictive
- off-guard
- pedestrian
- perfunctory
- permissive
- poor
- reckless
- regardless
- relaxed
- remiss
- slack
- slighting
- thoughtless
- unconcerned
- undiscriminating
- unfaithful
- unguarded
- unheeding
- unintelligent
- uninterested
- unmindful
- unobservant
- unperceiving
- unskillful
- untrue
- unwary
- unwatchful