Bastardize \Bas"tard*ize\, v. t. [imp. & p. p. {Bastardized} (?); 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.
The law is so indulgent as not to bastardize the child, if born, though not begotten, in lawful wedlock. --Blackstone.
2. To beget out of wedlock. [R.] --Shak.
3. to change something (for example, art forms) so that its value declines; to debase.