形容詞 blithe:

1. lacking or showing a lack of due concern
2. carefree and happy and lighthearted
   同義詞：blithesome, lighthearted, lightsome, light-hearted

1. Marked by blithe unconcern; nonchalant.
   漫不經(jīng)心的; 漠不關(guān)心的
2. She seems quite blithe.
   她看上去很快樂。

blithe

adj.（形容詞）
blith.er,blith.est
Carefree and lighthearted.
無憂無慮的，輕松的
Lacking or showing a lack of due concern; casual:
輕率的：缺少或表現(xiàn)缺乏適當(dāng)憂慮的；輕率的：
例句：
spoke with blithe ignorance of the true situation.See Synonyms at jolly
輕率無知地談?wù)撜鎸嵉那闆r參見 jolly

來源：
Middle English
中古英語
from Old English blothe
源自 古英語 blothe

【引伸】
blithe.ly
adv.（副詞）
blithe.ness
n.（名詞）