Where does “мракобесие” come from?

мракобесие (Russian) comes from Russian беситься, from Russian -ся, from Old East Slavic сѧ, from Proto-Slavic sę, from Proto-Balto-Slavic *sen, from Proto-Indo-European swé — self.

мракобесие (Russian): obscurantism opposition to enlightenment and progress

Definitions

  1. obscurantism opposition to enlightenment and progress

Ancestry of “мракобесие”, step by step

мракобесие traces back through two separate lines of ancestry.

via Russian беситься

StepLanguageWordMeaning
1Russianбеситьсяto become rabid; to rage, to be furious, to...
2Russian-сяReflexive suffix appended to finite verbs and...
3Old East Slavicсѧ
4Proto-Slaviconeself: myself, yourself, himself, herself,...
5Proto-Balto-Slavic*senoneself
6Proto-Indo-Europeanswéself

via Russian мрак

StepLanguageWordMeaning
1Russianмракshadow, darkness
2Old Church Slavonicмракъdark, darkness
3Proto-Slavicmorkъdarkness
4Proto-Balto-Slavic*markas
5Proto-Indo-Europeanmergʷ-dark, coloured; to flicker; to darken; to be dark
Every word from Proto-Indo-European swéEvery word from Russian -сяEvery word from Proto-Balto-Slavic *sen