Where does “gniewianin” come from?

gniewianin (Polish) comes from Polish gniew, from Proto-Slavic gněvъ, from Proto-Slavic -vъ, from Proto-Balto-Slavic *-was, from Proto-Indo-European -wós — Creates adjectives from verb stems.

Ancestry of “gniewianin”, step by step

StepLanguageWordMeaning
1Polishgniewanger, wrath, ire
2Proto-Slavicgněvъanger, wrath
3Proto-Slavic-vъFrom thematic declension of u-stem...
4Proto-Balto-Slavic*-was—
5Proto-Indo-European-wósCreates adjectives from verb stems
Every word from Proto-Indo-European -wós →Every word from Proto-Slavic -vъ →Every word from Proto-Slavic gněvъ →