This is the 13057th most frequent Polish word.
odpornościowego
"Odpornościowego" means "immune" or "related to immunity."
Governs the adjective form to describe the system in a sentence.
Ludzkie ciała mają silny system odpornościowego.
Human bodies have a strong immune system.
Shown in a possessive case to link to the system.
Diagnoza wskazała na zaburzenia układu odpornościowego.
The diagnosis pointed to disorders of the immune system.
Used within a noun phrase to establish its function.