- carefree, unworried - free of trouble and worry and care; "the carefree joys of childhood"; "carefree millionaires, untroubled financially"
Antonym: troubled (indirect, via untroubled)
- carefree, devil-may-care, freewheeling, happy-go-lucky, harum-scarum, slaphappy - cheerfully irresponsible; "carefree with his money"; "freewheeling urban youths"; "had a harum-scarum youth"
Antonym: responsible (indirect, via irresponsible)