This is the 5206th most frequent Turkish word.
itfaiyenin
"Itfaiyenin" means "of the fire brigade" or "belonging to the fire department" in English.
In this sentence, 'itfaiyenin' is a possessive form, indicating that the siren belongs to the fire department.
Itfaiyenin siren sesi geceyi böldü.
The fire engine's siren sound broke the silence of the night.
Here, 'itfaiyenin' is used in a possessive form to describe the quick intervention as an action belonging to or performed by the fire department.
Yangın sırasında itfaiyenin hızlı müdahalesi hayat kurtardı.
During the fire, the fire department's quick intervention saved lives.
In this example, 'itfaiyenin' refers to the fire department as the owner of the new equipment, using the possessive form.