Where does “świadkini” come from?

świadkini (Polish) comes from Polish świadek, from Old Polish świadek, from Proto-Slavic *sъvědъkъ, from Proto-Slavic *sъvěděti.

Ancestry of “świadkini”, step by step

StepLanguageWordMeaning
1Polishświadekwitness
2Old Polishświadekwitness
3Proto-Slavic*sъvědъkъwitness
4Proto-Slavic*sъvěděti—
Every word from Proto-Slavic *sъvěděti →Every word from Proto-Slavic *sъvědъkъ →Every word from Old Polish świadek →