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carelessness noun

  /ˈkɛələsnəs/ , /ˈkɛɹləsnəs/
  • Lack of care; the state or quality of being careless.
 Unvorsichtigkeit, Leichtsinn

careless adjective

  /ˈkɛələs/ , /ˈkɛəlɪs/ , /ˈkɛɹləs/
  • Not giving sufficient attention or thought, especially concerning the avoidance of harm or mistakes. [from 16thc.]
 nachlässig, fahrlässig, säumig, unachtsam, leichtsinnig, unbedacht
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