Where does “дурно” come from?

дурно (Russian) comes from Russian дурно́й, from Proto-Slavic *durьnъ — stupid, crazy.

дурно (Russian): badly in a bad manner

Definitions

  1. badly in a bad manner

Ancestry of “дурно”, step by step

StepLanguageWordMeaning
1Russianдурно́йfoolish, stupid
2Proto-Slavic*durьnъstupid, crazy
Every word from Proto-Slavic *durьnъ →Every word from Russian дурно́й →
дурно — Etymology, Origin & Word History | Etymology Explorer