基本解释n.漫不经心；不注意；疏忽同根派生 英汉例句用作名词 (n.)Her inattentiveness left me feeling less than thrilled about being there.她的漫不经心让我站在那儿觉得很不爽。Here, inattentiveness to security leaves one unsecured.在这里，不注意安全就无保障。