"carefree" in the adjective sense
1. carefree, unworried
free of trouble and worry and care
"the carefree joys of childhood"
"carefree millionaires, untroubled financially"
2. 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"
Source: WordNet® (An amazing lexical database of English)
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