This is the 6557th most frequent Polish word.
córka
Daughter.
Used to denote a family relationship, specifically the speaker's offspring.
Moja córka uwielbia czytać książki.
My daughter loves reading books.
Used to denote the offspring relation of someone other than the speaker.
Córka kolegi pracuje w szpitalu.
The colleague's daughter works at the hospital.
Used to denote a fictional or historical character in a narrative.