un·con·cerned 
/ˌʌnkənˈsɚnd/ adjective
/ˌʌnkənˈsɚnd/ adjective : not worried or upset : not concerned
▪ She's unconcerned about/with that issue. ▪ The economy seems to be slowing down, but many investors remain unconcerned.
▪ She's unconcerned about/with that issue. ▪ The economy seems to be slowing down, but many investors remain unconcerned.
— un·con·cern·ed·ly /ˌʌnkənˈsɚnədli/ adverb
