unnaturalize
/(ˌ)ʌnˈnatʃ(ə)rəlʌɪz/ /(ˌ)ʌnˈnatʃ(ə)r(ə)lʌɪz/verb
[with object] To give an unnatural or inauthentic quality to; to represent unnaturally.
Origin
Early 17th century (in an earlier sense). From un- + naturalize, in senses 1 and 3 after unnatural.