unconcerned -
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"
concerned feeling or showing worry or solicitude; "concerned parents of youthful offenders"; "was concerned about the future"; "we feel concerned about accomplishing the task at hand"; "greatly concerned not to disappoint a small child"
careless effortless and unstudied; "an impression of careless elegance"; "danced with careless grace"
untroubled free from turmoil or worries; "untroubled times"
blase nonchalantly unconcerned; "a blase attitude about housecleaning"
blithe carefree and happy and lighthearted; "was loved for her blithe spirit"; "a merry blithesome nature"; "her lighthearted nature"; "trilling songs with a lightsome heart"
insouciant,
nonchalant,
casual hasty and without attention to detail; not thorough; "a casual (or cursory) inspection failed to reveal the house's structural flaws"; "a passing glance"; "perfunctory courtesy"
degage,
uninvolved,
detached 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"
unconcerned -
not occupied or engaged with; "readers unconcerned with style"
unconcerned -
easy in mind; not worried; "the prisoner seems entirely unconcerned as to the outcome of the examination"
