unconcerned

adjectives

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"
antonym
is similar to
nonchalantly unconcerned
"a blase attitude about housecleaning"
is similar to
lacking or showing a lack of due concern
"spoke with blithe ignorance of the true situation"
is similar to
marked by blithe unconcern
"an ability to interest casual students"; "showed a casual disregard for cold weather"; "an utterly insouciant financial policy"; "an elegantly insouciant manner"; "drove his car with nonchalant abandon"; "was polite in a teasing nonchalant manner"
is similar to
showing lack of emotional involvement
"adopted a degage pose on the arm of the easy chair"- J.S.Perelman; "she may be detached or even unfeeling but at least she's not hypocritically effusive"; "an uninvolved bystander"
is similar to
showing no care or concern in attitude or action
"indifferent to the sufferings of others"; "indifferent to her plea"
see also
marked by lack of attention or consideration or forethought or thoroughness; not careful
"careless about her clothes"; "forgotten by some careless person"; "a careless housekeeper"; "careless proofreading"; "it was a careless mistake"; "hurt by a careless remark"
see also
not beset by troubles or disturbance or distress
"seemed untroubled by doubts of any kind"; "untroubled sleep"; "a kind untroubled face"
easy in mind; not worried
"the prisoner seems entirely unconcerned as to the outcome of the examination"
is similar to
not beset by troubles or disturbance or distress
"seemed untroubled by doubts of any kind"; "untroubled sleep"; "a kind untroubled face"
not occupied or engaged with
"readers unconcerned with style"
is similar to
not involved
"being uninvolved he remained objective"