unnatural
adjective/ɐ̃ti.nɐ.tu.ɾal/medium
an·ti·na·tu·ral
Definition
Contrary to the laws or order of nature; not natural, artificial, or forced.
He considered human cloning a profoundly unnatural act.
Her smile was forced and unnatural.
Common collocations
unnatural behaviorunnatural phenomenon
Etymology
Do grego 'antí' (contra) + latim 'naturalis' (natural).