This is the 16948th most frequent Turkish word.
üniversitesinin
"Of the university"
In this sentence, 'üniversitesinin' is the possessive form (3rd person singular) of 'üniversite', indicating ownership or association (in this case, the university belongs to Ali).
Ali, üniversitesinin kütüphanesinde çalışıyor.
Ali is working in his university's library.
Here, 'üniversitesinin' denotes possessiveness again, referring to the events organized by the university the subject is associated with.
Üniversitesinin etkinliklerine katılmayı çok seviyor.
He/she loves attending the events of his/her university.
'Üniversitesinin' once more signifies possessiveness, emphasizing the connection between the university and its success.