un·con·cerned /-ˈsɝnd/
 (a.)不關心的


 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.

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 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"