Where does “однонаправленный” come from?
однонаправленный (Russian) comes from Russian одно-, from Russian оди́н, from Old East Slavic оди́нъ, from Proto-Slavic edìnъ, from Proto-Balto-Slavic edīˀnas, from Proto-Balto-Slavic aiˀnas, from Proto-Indo-European óynos — one; single.
однонаправленный (Russian): unidirectional
Ancestry of “однонаправленный”, step by step