передовсім (Ukrainian) comes from Russian пе́ред, from Old East Slavic передъ, from Proto-Slavic perdъ, from Proto-Indo-European per-, from Proto-Indo-European pr̥tós — passed , crossed.
передовсім (Ukrainian): first of all, first and foremost, above all
Definitions
first of all, first and foremost, above all
Ancestry of “передовсім”, step by step
передовсім traces back through two separate lines of ancestry.