"unnatural" in the adjective sense
1. unnatural
not in accordance with or determined by nature contrary to nature
"an unnatural death"
"the child's unnatural interest in death"
2. 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"
3. affected, unnatural
speaking or behaving in an artificial way to make an impression
Source: WordNet® (An amazing lexical database of English)
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