köken: Etymology tree Proto-Indo-European *né Proto-Balto-Slavic *ne Proto-Slavic *ne Old Polish nie Old Polish nie- Polish nie- Polish pokonany Polish niepokonany From nie- + pokonany.
köken: Etymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Italic *n̥- Latin in- Latin expugnābilis Latin inexpugnābilis From in- + expugnābilis.