This is the 16395th most frequent Polish word.
wampirów
"Vampires" (genitive plural form).
Here, 'wampirów' correctly represents the genitive plural form of 'wampir' to specify possession or focus.
Film o życiu wampirów był interesujący.
The movie about the life of vampires was interesting.
Here, 'wampirów' is the genitive plural form of 'wampir' used to indicate an object of avoidance.
Nie boję się wampirów.
I am not afraid of vampires.
In this sentence, 'wampirów' is incorrectly used; the correct form should be 'wampirach' in locative case.