lucky
1 advantageous, blessed, charmed, favoured, fortunate, jammy (Brit. slang) on a roll (informal) prosperous, serendipitous, successful
2 adventitious, auspicious, fortuitous, opportune, propitious, providential, timely Antonyms bad, detrimental, ominous, unfavourable, unfortunate, unhappy, unlucky, unpromising, untimely
happy-go-lucky
blithe, carefree, casual, devil-may-care, easy-going, heedless, improvident, insouciant, irresponsible, light-hearted, nonchalant, unconcerned, untroubled
Antonyms
careworn, cheerless, gloomy, melancholy, morose, sad, serious, unhappy