(transitive, rare) To make unnatural.

Not natural. / Not occurring in nature, the environment or atmosphere / Going against nature; perverse.

In an unnatural manner; to an unnatural extent.

plural of unnaturality

(uncountable) The condition of being unnatural. / (countable) Something that does not occur naturally.

Any behaviour, manner or style that runs contrary to nature.

plural of unnaturalism

(evolutionary theory, rare, sometimes humorous or derogatory) The selection of certain genes caused by the actions of humans, especially the intentional intervention in the breeding of plants or animals in order to preserve selected genetic traits; eugenics, selective breeding or culling.