bastardize

verb

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.”

   “The case of a king who falsely charges his wife with adultery, seeks to execute her, and bastardizes his daughter resonates strongly with the plot of The Winter's Tale, and in fact suggests a reading of the play as an allegory of Anne's downfall and Elizabeth's bastardization, seventy-five years after the fact.”

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.”

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.”