This is the 4883rd most frequent Turkish word.
etkilerin
"Effects" or "impacts."
Here 'yan etkilerin' refers to 'the side effects' in the genetic case, denoting possession or association in the context of the medication.
Bu ilaç yan etkilerin yoğunlaşmasına neden olabilir.
This medication may cause the side effects to intensify.
Here 'etkilerini' refers to 'the effects' in the accusative case, as it is the object of the verb 'araştırıyor', meaning 'explores'.
Kitap, çevrenin etkilerini araştırıyor.
The book explores the effects of the environment.
Here 'etkilerin' refers to 'the effects' as the genitive case indicating cause or reason for the changes described.