Where does “опосредовать” come from?
опосредовать (Russian) comes from Russian посреди́, from Russian среди, from Proto-Slavic *serdъ, from Proto-Balto-Slavic śerd-, from Proto-Indo-European ḱerd- — heart.
опосредовать (Russian): to mediate
Ancestry of “опосредовать”, step by step