*bastardiz*

n. An act that debases or corrupts.
Syn. -- bastardisation. [ WordNet 1.5 ]

v. t. [ imp. & p. p. Bastardized (&unr_;); p. pr. & vb. n. Bastardizing. ] 1. To make or prove to be a bastard; to stigmatize as a bastard; to declare or decide legally to be illegitimate. [ 1913 Webster ]

The law is so indulgent as not to bastardize the child, if born, though not begotten, in lawful wedlock. Blackstone. [ 1913 Webster ]

2. To beget out of wedlock. [ R. ] Shak. [ 1913 Webster ]

3. to change something (for example, art forms) so that its value declines; to debase.
Syn. -- bastardise. [ WordNet 1.5 ]

v. t. [ Pref. em- + bastardize. ] To bastardize. [ Obs. ] [ 1913 Webster ]