adjective
disposed to accept cheerfully whatever happens
enjoyed a happy-go-lucky existence without needlessly worrying
Synonyms: carefree, free-minded, insouciant, lighthearted, lightsome; compare cool 2
Related Word: casual, easy, easygoing; blithe, careless, cheerful, feckless, heedless, lackadaisical; debonair, nonchalant, unconcerned; devil-may-care, reckless
Contrasted words: careful, cautious, circumspect, discreet, guarded, prudent