Debase

1. verb

   corrupt, debase, or make impure by adding a foreign or inferior substance; often by replacing valuable ingredients with inferior ones

   “adulterate liquor”

   Similar: load, adulterate, stretch, dilute

2. verb

   lower in value by increasing the base-metal content

   Similar: alloy

3. verb

   corrupt morally or by intemperance or sensuality

   “debauch the young people with wine and women”

   Similar: corrupt, pervert, subvert, demoralize, demoralise, debauch