buoyant
词形变化：
同义词：
floating | light | cheerful | lighthearted | elastic | springy | carefree | blessed | flushed | afloat | upbeat | optimistic | happy | resilient | resistant | flexible | tough | perky | floaty | chirpy |
反义词：
dismal | gloomy | melancholy |
词义辨析：
同义:
a.有弹性的, 有浮力的
elastic
floating
springy
a.活泼的; 轻快的
cheerful
light
lighthearted
carefree
同义参见:
flushed
blessed
反义:
a.轻快的
gloomy
dismal
melancholy
low-spirited