adj. 25B6; adjective CHEERFUL, cheery, happy, merry, jolly, joyful; lively, perky, bright, buoyant, bubbly, bouncy, breezy, full of the joys of spring, in good spirits, exuberant, ebullient; carefree, airy, light-hearted, nonchalant, insouciant, happy-go-lucky; informal bright-eyed and bushy-tailed, full of beans, chirpy; poetic/literary blithe, blithesome.
depressed, serious.