1. to make or become mongrel; to mix breeds or types in a way that produces something of mixed or inferior quality
Usage: British spelling (American: mongrelizes); third person singular present tense; often used critically or disapprovingly

Examples

• The breeder warned that careless crossing mongrelises the bloodline.
• Some critics argue that modern architecture mongrelises traditional design principles.
• The fusion of musical styles mongrelises the classical form.
• Excessive borrowing from other languages mongrelises the purity of the native tongue.
• The committee feared that compromise would mongrelise the original vision of the project.