insouciance
/ɪnˈsuːsjəns/noun
mass noun
- casual lack of concern; indifference漫不经心; 漠不关心：
an impression of boyish insouciance.
给人男孩子般无忧无虑的印象。
派生词
insouciant
adjectiveinsouciantly
adverb词源
late 18th cent.: French, from insouciant, from in- 'not' + souciant 'worrying' （present participle of soucier）.