This is the 733rd most frequent Polish word.
strażacy
Firefighters.
In this sentence, 'strażacy' is the subject and refers to individuals whose occupation is to extinguish fires, emphasizing their professional role.
Strażacy gasili pożar w lesie.
The firefighters were extinguishing a forest fire.
Here, 'strażaków' is in the genitive plural form, used to express admiration towards firefighters in the context of a public event.
Dzieci były zafascynowane widokiem strażaków na pokazie sprzętu.
The children were fascinated by the sight of the firefighters at the equipment show.
In this example, the singular 'strażak' is used as a predicate nominative, describing someone's former profession.