To reduce from a higher to a lower state or grade of worth, dignity, purity, station, etc.; to degrade; to lower; to deteriorate; to abase; as, to debase the character by crime; to debase the mind by frivolity; to debase style by vulgar words.
Dilute, Adulterate, Stretch
Vitiate, Profane, Subvert, Demoralize, Deprave, Pervert, Misdirect, Corrupt, Demoralise, Debauch
Debase in Spanish