Where does “безмятежно” come from?

безмятежно (Russian) comes from Russian -о́ — Suffix added to adjectives to produce adverbs; highly productive.

безмятежно (Russian): serenely, quietly

Definitions

  1. serenely, quietly

Ancestry of “безмятежно”, step by step

StepLanguageWordMeaning
1Russian-о́Suffix added to adjectives to produce adverbs; highly productive
Every word from Russian -о́
безмятежно — Etymology, Origin & Word History | Etymology Explorer