debase
     v 1: corrupt morally or by intemperance or sensuality; "debauch
          the young people with wine and women"; "Socrates was
          accused of corrupting young men"; "Do school counselors
          subvert young children?"; "corrupt the morals" [syn: {corrupt},
           {pervert}, {subvert}, {demoralize}, {demoralise}, {debauch},
           {profane}, {vitiate}, {deprave}, {misdirect}]
     2: lower in value by increasing the base-metal content [syn: {alloy}]
     3: corrupt, debase, or make impure by adding a foreign or
        inferior substance; often by replacing valuable
        ingredients with inferior ones; "adulterate liquor" [syn:
        {adulterate}, {stretch}, {dilute}]
Source: WordNet® 2.0