This is the 5511th most frequent Russian word.
пожарного
"Пожарного" means "of the firefighter" or "firefighter's" in English.
In this sentence, 'пожарного' is used in its singular accusative form to describe a firefighter being summoned for action.
Вызвали пожарного, чтобы потушить пожар.
A firefighter was called to extinguish the fire.
Here, 'пожарного' is in the accusative case, referring to a firefighter seen near a location.
Мы заметили пожарного у здания.
We noticed the firefighter near the building.
In this sentence, 'пожарного' is in the genitive case, indicating possession or designation of equipment intended for a firefighter.