joyousness 

英汉解释

n. 高兴；快乐

同义词

n. joy，joyfulness

反义词

n.   sorrow

参考例句

1. He is, for me: sigh, prayer, joyousness.
对我来说，他就是叹息，祈祷和欢乐。
2. Like the birds and the flowers, she seemed to recover her beauty and joyousness in the morning sunshine.
象鸟儿花儿一样，她似乎在早晨的阳光里恢复了她的美丽和欢乐。
3. My lady seemed, on this particular September day, restless from very joyousness of spirit, and unable to stay long in one place, or occupy herself with one thing.
在九月的这个特殊日子里，爵士夫人似乎由于兴高采烈而坐立不定，她没法儿长时间待在一个地方或专心于一件事情上。

英英解释

n.
  1. the emotion of great happiness

网络释义

joyousness
快乐; 令人开心;