英汉解释

n. 不关心；不感兴趣；冷淡

同义词

n. indifference，nonchalance

反义词

n.   concern

参考例句

1. Marked by blithe unconcern; nonchalant.
'漫不经心'。''的；漠不关心的。
2. She hear the news of his death with apparent unconcern.
她听到他的死讯无动于衷。
3. He was incapable of fear, meeting personal dangers with the calmest unconcern.
他不知道害怕，置个人安危于不顾。

英英解释

n.
  1. the trait of remaining calm and seeming not to care; a casual lack of concern
  2. a feeling of lack of concern

网络释义

unconcern
漠不关心; 不关心; 漫不经心; 无关系;
inadvertence insouciance slip over unconcern
漫不经心;
disinterest insensibility let slide nonchalance unconcern
不关心;