adj. 25B6; adjective
an effervescent drink : FIZZY, sparkling, carbonated, aerated, gassy, bubbly; mousseux, pétillant, spumante.
effervescent young people : VIVACIOUS, lively, animated, high-spirited, bubbly, ebullient, buoyant, sparkling, scintillating, light-hearted, jaunty, happy, jolly, cheery, cheerful, perky, sunny, enthusiastic, irrepressible, vital, zestful, energetic, dynamic; informal bright-eyed and bushy-tailed, peppy, bouncy, upbeat, chirpy, full of beans.
still, depressed.