adj.愉悦的；adj.漂浮的，可浮起来的,
Merriam-Webster Online Dictionary
buoyant (adjective) having as - buoyancy
a) capable of floating
b) - cheerful gay
c) capable of maintaining a satisfactorily high level - a buoyant economy
Merriam-Webster Online Thesaurus
buoyant (adjective)1.
having or showing a good mood or disposition
SYNONYMS:
blithe, blithesome, bright, buoyant, canty, cheery, chipper, eupeptic, gay, gladsome, lightsome, sunny, upbeat, winsomeRELATED WORDS:
hopeful, optimistic, rosy, sanguine; animated, chirpy, jaunty, lilting, lively, perky, sprightful, sprightly, vivacious; carefree, careless, cavalier, devil-may-care, easygoing, happy-go-lucky, insouciant, lighthearted, unconcerned; boon, gleeful, jocund, jolly, jovial, merry, mirthful; blissful, delighted, glad, gratified, happy, joyful, joyous, pleased, satisfied, tickled; beaming, grinning, laughing, smilingNEAR ANTONYMS:
joyless, sad, unhappy, unsatisfied; dull, lethargic, listless, sluggish, torpid; blue, brokenhearted, crestfallen, dejected, depressed, despondent, disconsolate, disheartened, down, downcast, downhearted, droopy, forlorn, hangdog, heavyhearted, inconsolable, low, low-spirited, melancholy, mirthless, sorrowful2.
joyously unrestrained
SYNONYMS:
bouncy, bubbly, buoyant, crank, effervescent, frolic, frolicsome, gamesome, gay, high-spirited, vivaciousRELATED WORDS:
extroverted ( extraverted), outgoing, uninhibited; carefree, happy-go-lucky, insouciant, joyful, lighthearted, lively, sprightly; boisterous, raucous, rollicking, rowdy; giddy, light-headed, overexuberant, silly; ecstatic, euphoric, lyric, rapturous; audacious, bold, brash, brazen, impertinent, impudent, insolent, saucyNEAR ANTONYMS:
constrained, inhibited, repressed, restrained, subdued; impassive, phlegmatic, stoic ( stoical), stolid; depressed, dour, glum, morose, surly