bastardize
verb
[ ˈbɑːstədʌɪz ]
• change (something) in such a way as to lower its quality or value, typically by adding new elements.
• "our biggest fear was they were going to take our script and bastardize it"
Similar:
adulterate,
corrupt,
contaminate,
weaken,
dilute,
spoil,
taint,
pollute,
foul,
defile,
debase,
degrade,
devalue,
depreciate,
distort,
vitiate,
• declare (someone) illegitimate.
• "the Act of 1534 bastardized Princess Mary"