Etymology tree Proto-Indo-European *né Proto-Balto-Slavic *ne Proto-Slavic *ne Old Polish nie Old Polish nie- Proto-Indo-European *weh₁-der. Proto-Balto-Slavic *wēˀrāˀ Proto-Slavic *vě̀ra Old Polish wiera Old Polish niewiera Polish niewiara Inherited from Old Polish niewiera. By surface analysis, nie- + wiara.