Attentive :: Attentive (a.) Heedful; intent; observant; regarding with care or attention.
Attentive :: Attentive (a.) Heedful of the comfort of others; courteous.
Inattentive :: Inattentive (a.) Not attentive; not fixing the mind on an object; heedless; careless; negligent; regardless; as, an inattentive spectator or hearer; an inattentive habit..