unconcern

[ˌʌnkənˈsɜ:n] [ˌʌnkənˈsɜrn]
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柯林斯高阶英汉双解学习词典释义
英英词典释义
  • Noun
    1. the trait of remaining calm and seeming not to care; a casual lack of concern
    2. a feeling of lack of concern