Where does “среднесрочный” come from?

среднесрочный (Russian) comes from Russian сре́дний, from Old Church Slavonic срѣдьнъ, from Proto-Slavic serdьnъ, from Proto-Slavic serda, from Proto-Balto-Slavic śerd-, from Proto-Indo-European ḱerd- — heart.

среднесрочный (Russian): medium-term

Definitions

  1. medium-term

Ancestry of “среднесрочный”, step by step

среднесрочный traces back through two separate lines of ancestry.

via Russian сре́дний

StepLanguageWordMeaning
1Russianсре́днийmiddle
2Old Church Slavonicсрѣдьнъ—
3Proto-Slavicserdьnъmiddle, central
4Proto-Slavicserdamiddle; Wednesday
5Proto-Balto-Slavicśerd-—
6Proto-Indo-Europeanḱerd-heart

via Russian срок

StepLanguageWordMeaning
1Russianсрокperiod, span; date, term, time
2Old East Slavicсърокъ—
3Proto-Slavicsъrokъappointment, due date, timespan for which something is agreed upon
Every word from Proto-Indo-European ḱerd- →Every word from Proto-Balto-Slavic śerd- →Every word from Proto-Slavic serda →