unnatural -- (not in accordance with or determined by nature; contrary to nature; "an unnatural death"; "the child's unnatural interest in death")
abnormal, unnatural -- (not normal; not typical or usual or regular or conforming to a norm; "abnormal powers of concentration"; "abnormal amounts of rain"; "abnormal circumstances"; "an abnormal interest in food")
affected, unnatural -- (speaking or behaving in an artificial way to make an impression)
(TTS Sound)
