Old English bliþe "joyous, kind, cheerful, pleasant," from Proto-Germanic *blithiz "gentle, kind" (cognates: Old Saxon bliði "bright, happy," Middle Dutch blide, Dutch blijde, Old Norse bliðr "mild, gentle," Old High German blidi "gay, friendly," Gothic bleiþs "kind, friendly, merciful").
Rare since 16c. No cognates outside Germanic. "The earlier application was to the outward expression of kindly feeling, sympathy, affection to others, as in Gothic and ON.; but in OE. the word had come more usually to be applied to the external manifestation of one's own pleased or happy frame of mind, and hence even to the state itself." [OED]
中文解释
blithe：不理事。任何事都不理，才能——快乐的，无忧无虑的。
实用例句
1. He drove with blithe disregard for the rules of the road.
他开车时全然不顾交通法规。
来自《权威词典》
2. A blithe heart makes a blooming visage.
人逢喜事精神爽.
来自《简明英汉词典》
3. She said "hi" with the blithe assurance of someone who knew how much she'd been missed.
她高兴地说了声“嗨”，好像确信大家非常想念她似的。
来自柯林斯例句
4. Suzanne's feelings about food and eating had gone from blithe unconcern to anxiety.
苏珊娜对饮食的态度已经从无所谓变成了焦虑不安。
来自柯林斯例句
5. It does so with blithe disregard for best scientific practice.