unconcernedly

from WordNet (r) 3.0 (2006)

unconcernedly
    adv 1: in an unconcerned manner; "war was breaking out in
           Europe, but she unconcernedly planned for a holiday"

from The Collaborative International Dictionary of English v.0.48

Unconcerned \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.
   [1913 Webster]

         Happy mortals, unconcerned for more.     --Dryden.
   [1913 Webster]