cheerful

形容词 cheerful:

1. being full of or promoting cheer; having or showing good spirits
2. pleasantly (even unrealistically) optimistic
   同义词：pollyannaish, upbeat

1. Whether (she is) sick or fine, she is always cheerful.
   不管她生不生病，她总是开开心心的。
2. His cheerful manner belied his real feelings.
   他那快活的样子掩饰了他真实的感情。
3. A cheerful wood fire was crackling in the sitting room.
   熊熊的柴火在起居室的炉中噼啪作响。
4. The leader's vital and cheerful manner filled his men with courage.
   指挥官朝气蓬勃和欢欣愉悦的神态使士兵们勇气倍增。
5. In a joyful, cheerful, or happy manner; merrily.
   欢快地用快乐的、高兴的方式; 喜气洋洋地
6. I have a cozy and cheerful room.
   我有一个舒适的令人愉快的房间。
7. She remained cheerful throughout the trip.
   旅行中她始终兴致勃勃。

cheer.ful

adj.（形容词）
Being in good spirits; merry.See Synonyms at glad
兴高采烈的；欢乐的参见 glad
Promoting a feeling of cheer; pleasant:
使人感到高兴的；令人愉快的：
例句：
a cozy, cheerful room.
舒适的、令人愉快的房间

Reflecting willingness or good humor:
乐意的：表明诚心诚意或者愉快的：
例句：
cheerful labor.
乐意的效劳

【引伸】
cheer.fully
adv.（副词）
cheer.fulness
n.（名词）