叢生 [ㄘㄨㄥˊ ㄕㄥ; cong2 sheng1]
  growing as a thicket
  overgrown
  breaking out everywhere (of disease, social disorder etc)
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  叢生
  そうせい
  noun (common) (futsuumeishi)
  noun or participle which takes the aux. verb suru
  dense growth
  healthy growth
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