debase

verb

1. 1

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

   adulterate liquor

2. 2

   lower in value by increasing the base-metal content

3. 3

   corrupt morally or by intemperance or sensuality

   debauch the young people with wine and women

   Socrates was accused of corrupting young men