impure in WordNet English dictionary

1. (used of persons or behaviors) immoral or obscene
   "impure thoughts"
   impure 
   
2. combined with extraneous elements
   impure 
   
3. having a physical or moral blemish so as to make impure according to dietary or ceremonial laws
   "unclean meat"; "and the swine...is unclean to you"-Leviticus 11:3
   unclean  impure