This is the 3067th most frequent Turkish word.
başvurusu
"Başvurusu" means "application" or "request" in English.
In this sentence, 'başvurusu' refers to the act (application) of applying to a university. The possessive suffix '-u' indicates that it is associated with the word 'üniversite' (university).
Üniversite başvurusu için gerekli belgeler gönderilmelidir.
The necessary documents must be sent for the university application.
Here, 'başvurusu' denotes the act (application) of applying for employment. The possessive suffix '-u' links the application to the job ('işe alım').
İşe alım başvurusu olumlu sonuçlandı.
The job application was positively concluded.
In this case, 'başvurusunu' specifies the act (application) of applying for a scholarship, with additional usage of the accusative suffix '-nu' indicating the direct object of the action 'hazırlamalıdır' (should prepare).