Where does “ugnis” come from?
ugnis (Proto-Balto-Slavic) comes from Proto-Indo-European h₁n̥gʷnis, from Proto-Indo-European h₁engʷ- — to burn; fire.
ugnis (Proto-Balto-Slavic) comes from Proto-Indo-European h₁n̥gʷnis, from Proto-Indo-European h₁engʷ- — to burn; fire.