Unconcerned
(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.
Similar Words:
Unconceivable Unconcern Unconcerned Unconcerning Unconcernment Unconcludent Unconcluding Unconclusive Unconditional Unconditioned