Contaminated
Part of speech: verb
Definition: To make something dangerous or toxic by introducing impurities or foreign matter.
Part of speech: adjective
Definition: adulterated; impure
Example sentence: Santa Clara County has 23 active Superfund sites, more than any other county in the United States. All of them were designated as such in the mid to late 1980s, and most were contaminated by toxic chemicals involved in making computer parts. Completely cleaning up these chemicals may be impossible.
Dirty
Part of speech: verb
Definition: To make (something) dirty.To stain or tarnish (somebody) with dishonor.To debase by distorting the real nature of (something).To become soiled.
Part of speech: adverb
Definition: In a dirty manner.
Part of speech: adjective
Definition: Unclean; covered with or containing unpleasant substances such as dirt or grime.That makes one unclean; corrupting, infecting.Morally unclean; obscene or indecent, especially sexually.Dishonourable; violating accepted standards or rules.Corrupt, illegal, or improper.Out of tune.Of color, discolored by impurities.Containing data which need to be written back to a larger memory.Carrying illegal drugs.
Example sentence: Civility, politeness, it's like a cement in a society: binds it together. And when we lose it, then I think we all feel lesser and slightly dirty because of it.