[adj] carefree and happy and lighthearted; "was loved for her blithe spirit"; "a merry blithesome nature"; "her lighthearted nature"; "trilling songs with a lightsome heart"
blithe, cheerful, lighthearted, lightsome
beaming, blithe, boon, bright, bright and sunny, cheerful, cheery, elated, eupeptic, euphoric, exalted, exhilarated, festive, flushed, gay, genial, glad, gladsome, gleeful, glowing, happy, high, hopeful, in good spirits, in high spirits, irrepressible, jo