This is the 13990th most frequent Turkish word.
merkezin
"Merkezin" means "of the center" or "your center" in English, depending on context.
Here, 'merkezin' is used as a possessive form of 'merkez' (center), denoting the center itself.
Merkezin önünde buluştuk.
We met in front of the center.
In this sentence, 'merkezin' specifies ownership or association of the activities to the local center.
O yerel merkezin etkinliklerine katılacağım.
I will join the activities of that local center.
Here, 'merkezin' refers to the opinion belonging to 'the center', signifying possessiveness.