[adj] failing to keep in mind; "forgetful of her responsibilities"; "oblivious old age" [adj] not mindful or attentive; "while thus unmindful of his steps he stumbled"- G.B.Shaw [adj] not retentive
amnesiac, amnesic, inattentive, mindless, oblivious, short, unmindful, unretentive
aware, mindful, retentive
absent, absentminded, absent-minded, abstracted, airy, amnesiac, amnestic, bemused, blocked, careless, casual, converted, cursory, degage, disregardant, disregardful, distracted, dreaming, dreamy, easygoing, flippant, forgetting, free and easy, heedless,