This word is from EmGee's word list

debased

Definition:

ruined in character or quality

lowered in value; "the dollar is low"; "a debased currency"

mixed with impurities

Example:

1.
to reduce in quality or value; adulterate: They debased the value of the dollar.
2.
to lower in rank, dignity, or significance: He wouldn't debase himself by doing manual labo