corrupt — Someone who is corrupt behaves in a way that is morally wrong, especially by doing dishonest or illegal things in return for money or power.
pollute — to make foul or unclean, especially with harmful chemical or waste products; dirty: to pollute the air with smoke.
ruin — ruins, the remains of a building, city, etc., that has been destroyed or that is in disrepair or a state of decay: We visited the ruins of ancient Greece.
adulterate — If something such as food or drink is adulterated, someone has made its quality worse by adding water or cheaper products to it.
defile — To defile something that people think is important or holy means to do something to it or say something about it which is offensive.
foul — grossly offensive to the senses; disgustingly loathsome; noisome: a foul smell.