distorted and unnatural in shape or size; abnormal and hideous; "tales of grotesque serpents eight fathoms long that churned the seas"; "twisted into monstrous shapes"

Not natural; contrary, or not conforming, to the order of nature; being without natural traits; as, unnatural crimes.

not in accordance with or determined by nature; contrary to nature; "an unnatural death"; "the child's unnatural interest in death"

speaking or behaving in an artificial way to make an impression

Term used to describe going the opposite (unnatural) direction to what you normally go.