debase

v. (-sing) 1 lower in quality, value, or character. 2 depreciate (a coin) by alloying etc.  debasement n. [from *de-, *abase]

a. 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.