This is the 5898th most frequent Polish word.
zgonu
"Zgonu" means "death" or "decease" in English.
The usage of 'zgonu' in this sentence is in its genitive singular form, indicating possession of 'the death' or 'of death'.
Lekarz potwierdził zgonu pacjenta w szpitalu.
The doctor confirmed the death of the patient in the hospital.
Here, 'zgonu' is in the genitive singular form, used after the preposition 'o' and referring to 'death'.
Rodzina została poinformowana o przyczynie zgonu.
The family was informed about the cause of death.
In this case, 'zgonu' acts as a genitive singular form, denoting the possession or association with the 'death'.