1) Adulterates 2) Besmirches 3) Causes impurity 4) Contaminates 5) Contminates 6) Flaws; spots 7) Gives a bad name to 8) Infects 9) Introduces impurities to 10) Makes impure 11) Poisons 12) Pollutes 13) Puts in a bad light 14) Renders impure 15) Ruins 16) Ruins the reputation of 17) Spikes the punchbowl 1) Soils