Where does “безумно” come from?

безумно (Russian) comes from Russian безу́мный, from Proto-Slavic *bezumьnъ — insane, mindless.

безумно (Russian): madly, awfully; terribly, dreadfully, extremely;...

Definitions

  1. madly, awfully; terribly, dreadfully, extremely;...

Ancestry of “безумно”, step by step

StepLanguageWordMeaning
1Russianбезу́мныйcrazy, mad, insane
2Proto-Slavic*bezumьnъinsane, mindless
Every word from Proto-Slavic *bezumьnъ →Every word from Russian безу́мный →
безумно — Etymology, Origin & Word History | Etymology Explorer