Where does “Rdzak” come from?

Rdzak (Polish) comes from Polish rdza, from Proto-Slavic rъďa, from Proto-Slavic rudъ, from Proto-Balto-Slavic roudos, from Proto-Indo-European h₁rowdʰ-o-, from Proto-Indo-European h₁rewdʰ- — red.

Ancestry of “Rdzak”, step by step

StepLanguageWordMeaning
1Polishrdzarust
2Proto-Slavicrъďarust
3Proto-Slavicrudъred, blood red, reddish; ginger; brown
4Proto-Balto-Slavicroudos—
5Proto-Indo-Europeanh₁rowdʰ-o-—
6Proto-Indo-Europeanh₁rewdʰ-red
Every word from Proto-Indo-European h₁rewdʰ- →Every word from Proto-Indo-European h₁rowdʰ-o- →Every word from Proto-Balto-Slavic roudos →