carefree /(kâr"frē`)/

care·free

carefree

adj.
  1. Free of trouble and worry and care; as, the carefree joys of childhood; carefree millionaires, untroubled financially.
  2. nonchalant in a cheerful manner.
  3. cheerfully irresponsible; as, carefree with his money. Opposite of careful.
  4. same as unconcerned. Opposite of concerned.