happy-go-lucky Synonyms

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