cleanliness
  清潔,乾淨
  Clean·li·ness n.  State of being cleanly; neatness of person or dress.
     Cleanliness from head to heel.   --Swift.
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  cleanliness
       n 1: the habit of keeping free of superficial imperfections [ant:
             uncleanliness]
       2: diligence in keeping clean [ant: uncleanliness]