unconcerned adj

1 lacking in interest or care or feeling; "the average American...is unconcerned that his or her plight is the result of a complex of personal and economic and governmental actions...beyond the normal citizen's comprehension and control"; "blithely unconcerned about his friend's plight" [ant: concerned]

2 easy in mind; not worried; "the prisoner seems entirely unconcerned as to the outcome of the examination"

3 not occupied or engaged with; "readers unconcerned with style"

English

Adjective

1. indifferent and having no interest; aloof
2. not worried, anxious or apprehensive

Laodicean, Olympian, aloof, apathetic, ataractic, benumbed, blah, blase, bored, careless, casual, collected, comatose, composed, cool, degage, desensitized, detached, devil-may-care, disinterested, dispassionate, disregardful, distant, dull, easy, easygoing, free and easy, heartless, hebetudinous, heedless, hopeless, impassive, in a stupor, inattentive, incurious, indifferent, inexcitable, insouciant, lackadaisical, languid, lethargic, listless, mindless, negligent, nonchalant, numb, numbed, offhand, passive, perfunctory, phlegmatic, pluckless, pococurante, reckless, regardless, remote, resigned, slack, sluggish, soporific, spiritless, spunkless, stoic, stolid, stupefied, supine, torpid, turned-off, unanxious, uncaring, undiscriminating, uninquiring, uninterested, uninvolved, unmindful, unsolicitous, withdrawn