marked by lack of attention or consideration or forethought or thoroughness; not careful; "careless about her clothes"; "forgotten by some careless person"; "a careless housekeeper"; "careless proofreading"; "it was a careless mistake"; "hurt by a careless remark" 注意、熟慮、計画、または徹底の欠如によりマークされる。慎重さに欠ける。
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