bastardise

Verb

bastardize (third-person singular simple present bastardizes, present participle bastardizing, simple past and past participle bastardized)

1. (British, English, Oxford, US) To claim or demonstrate that someone is a bastard, or illegitimate.
   • Our law is so indulgent as not to bastardize the child, if it be born, though not begotten, in lawful wedlock.1765–1769, William Blackstone, Commentaries on the Laws of England, (please specify |book=I to IV), Oxford, Oxfordshire: […] Clarendon Press, →OCLC
2. (British, English, Oxford, US) To reduce from a higher to a lower state, such as by removing refined elements or introducing debased elements; to debase.
   • The simplified word processor is a less-functional, bastardized version of the full program.

   Synonyms:

   butcher, debase, mongrelize, sophisticate, abase, adulter, adulterate, adulterize, alloy, balderdash

3. (British, English, Oxford, US) To beget out of wedlock.
   • I should / have been that I am, had the maidenliest star in the / firmament twinkled on my bastardizing.c. 1603–1606, William Shakespeare, King Lear, act 1, scene 2, lines 130–132