Un′con‐cerned″ (?), a. Not concerned; not anxious or solicitous; easy in mind; carelessly secure; indifferent; as, to be unconcerned at what has happened; to be unconcerned about the future. — Un′con‐cern″ed‐ly (#), adv. — Un′con‐cern″ed‐ness, n.
Happy mortals, unconcerned for more. Dryden.