father's in Polish:

1. ojcowski

Polish word "father's"(ojcowski) occurs in sets:

Fiszki z książki - "'Me and Nobbles'" (Amy Le Feuvre)
Fiszki z książki - "The Christian A Story" (Hall C...
Fiszki z książki - "A Child of the Jago" (Arthur M...
Fiszki z książki - "My New Home" (Mary Louisa Mole...
Fiszki z książki - "Fenwick's Career" (Mrs. Humphr...