Where does “серийный” come from?
серийный (Russian) comes from Russian се́рия, from Latin seriēs, from Latin serō, from Latin sērus, from Proto-Italic swerjos, from Proto-Indo-European swer-yo-s, from Proto-Indo-European swer- — to ache; to fester; wound; injury.
серийный (Russian): serial, series
Ancestry of “серийный”, step by step