seediness       
noun [ U ] uk/ˈsiː.di.nəs/ us/ˈsiː.di.nəs/
 破旧,褴褛;肮脏;下流
the quality of looking dirty or in bad condition and likely to be involved in dishonest or illegal activities
  The cinema has a certain seediness left over from when it was a strip club. 这家电影院以前是一家脱衣舞俱乐部,现在还有一些之前留下的肮脏痕迹。 
 See: seedy
 - More examples
 - The appeal of casinos is that there's some glamour and some seediness.
 - The blight of unwanted buildings has infected virtually every street, creating an air of seediness.
 - They loved his cool, his on-screen cruelty, his seediness.
 - It seems unable to shake off its image of seaside seediness.