adj. 25B6; adjective UNWORRIED, untroubled, blithe, airy, nonchalant, insouciant, happy-go-lucky, free and easy, easy-going, relaxed; informal laid-back.
careworn.
CAREFREE
Meaning of CAREFREE in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012