This is the 8453rd most frequent Polish word.
policjantka
"Policjantka" means "policewoman" in English.
Here, 'policjantka' serves as the subject noun, specifically referring to a female police officer.
Policjantka patroluje ulice miasta.
The policewoman patrols the city's streets.
In this sentence, 'policjantkę' is in the accusative case, being the direct object of the verb 'widziałem' (I saw).
Widziałem policjantkę w parku.
I saw a policewoman in the park.
Here, 'policjantką' is in the instrumental case, used with the preposition 'z' to indicate who the conversation was with.