Where does “неизвестно” come from?

неизвестно (Bulgarian) comes from Bulgarian неизве́стен, from Bulgarian не-, from Old Church Slavonic не-.

неизвестно (Bulgarian): unknown (variable, parameter, value)

Definitions

  1. unknown (variable, parameter, value)

Ancestry of “неизвестно”, step by step

StepLanguageWordMeaning
1Bulgarianнеизве́стенunknown not known, not familiar, not famous
2Bulgarianне-un-
3Old Church Slavonicне-—
Every word from Old Church Slavonic не- →Every word from Bulgarian не- →Every word from Bulgarian неизве́стен →