This is the 1114th most frequent Turkish word.
etkisini
Its effect.
In this sentence, 'etkisini' refers to the tangible outcome or impact of the medicine.
Bu ilaç etkisini kısa sürede gösterdi.
This medicine showed its effect in a short time.
Here, 'etkisini' addresses the psychological or emotional influence the teacher's attitude had on the students.
Öğretmenin tavrı öğrenciler üzerinde etkisini hissettirdi.
The teacher's attitude made its impact felt on the students.
In this context, 'etkisini' indicates the enduring or residual influence of events that reduces over time.