Carefree

прилагательное беззаботный, беспечный, легкомысленный Синоним(ы): careless, light-hearted

Большой англо-русский словарь

Carefree

adjective free from care: as a. having no worries or troubles b. irresponsible Example: is carefree with his money

Merriam-Webster's Collegiate Dictionary