Adjectives

(s)carefree, unworriedfree of trouble and worry and care“the carefree joys of childhood”, “carefree millionaires, untroubled financially”
(s)carefree, devil-may-care, freewheeling, happy-go-lucky, harum-scarum, slaphappycheerfully irresponsible“carefree with his money”, “freewheeling urban youths”, “had a harum-scarum youth”