Where does “опасно” come from?

опасно (Russian) comes from Russian опа́сный, from Proto-Slavic *o(b)pasьnъ — circumspect, vigilant, wary, attentive.

опасно (Russian): dangerously, perilously

Definitions

  1. dangerously, perilously

Ancestry of “опасно”, step by step

StepLanguageWordMeaning
1Russianопа́сныйdangerous, perilous
2Proto-Slavic*o(b)pasьnъcircumspect, vigilant, wary, attentive
Every word from Proto-Slavic *o(b)pasьnъ →Every word from Russian опа́сный →