Immoral — obscene (6)
I believe the answer is:
impure
I believe this is a double definition.
'immoral' is the first definition.
(thesaurus)
'obscene' is the second definition.
(thesaurus)
(Other definitions for impure that I've seen before include "Tainted, not chaste" , "Defiled" , "Sullied or adulterated" , "Contaminated or licentious" , "Corrupt" .)