忘恩
  ぼうおん
  noun (common) (futsuumeishi)
  ingratitude
  thanklessness
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  防音
  ぼうおん
  noun (common) (futsuumeishi)
  noun or participle which takes the aux. verb suru
  nouns which may take the genitive case particle `no'
  soundproof(ing)
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