Where does “kurski” come from?

kurski (Polish) comes from Polish kura, from Proto-Slavic kura, from Proto-Slavic -a, from Proto-Indo-European -ōd.

Ancestry of “kurski”, step by step

StepLanguageWordMeaning
1Polishkurahen; genitive/accusative singular of kur
2Proto-Slavickurahen
3Proto-Slavic-aid
4Proto-Indo-European-ōd—
Every word from Proto-Indo-European -ōd →Every word from Proto-Slavic -a →Every word from Proto-Slavic kura →