by-product

noun
1
a substance that is produced during the process of making or destroying something else
محصول جانبی, مواد فرعی, فرآورده ثانویه
2
a thing that happens, often unexpectedly, as the result of something else
نتیجه جانبی, محصول جانبی, پیامد فرعی
One of the by-products of unemployment is an increase in crime.