happy-go-lucky Synonyms

carefree devil-may-care untroubled serene relaxed radiant nonchalant mirthful merry light-hearted joyous joyful jovial sprightly sunny unconcerned cheery unworried slaphappy freewheeling vivacious chirpy peppy easygoing laid-back upbeat jolly jocund content chipper cheerful casual buoyant bubbly bright breezy blithesome blithe blissful contented easy-going exuberant jaunty insouciant heedless harum-scarum happy gleeful gladsome glad