optimistic
词形变化：
形容词: optimistic | 副词: optimistically |
同义词：
bright | cheerful | hopeful | sanguine | pleasant | radiant | happy | jaunty | glad | lighthearted | carefree | rosy | flushed | anticipative | positive | expectant | confident | enthusiastic | buoyant | affirmative |
反义词：
词义辨析：
同义:
a.高兴的
cheerful
happy
bright
pleasant
radiant
glad
lighthearted
jaunty
carefree
同义参见:
anticipative
sanguine
rosy
flushed
hopeful
反义:
a.乐观的; 乐观主义的
pessimistic
反义参见:
despairing
cynical
cynic