1. 名詞
   不可數名詞: 漫不經心
   滿不在乎
   無憂無慮
   

   同義字詞
   apathy,casualness,complacence,disinterestedness,disregard,incuriosity,incuriousness,indifference,nonchalance,torpor,unconcern
   

例句

1. Sara envied their insouciance .
2. All that is essential to his critical insouciance .
3. She helped herself to trifle with splendid insouciance .
4. Now with the war, that insouciance had become hard-boiled.
5. Their insouciance is irritating, and also rather charming.
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