Where does “serieux” come from?
serieux (Old French) comes from Medieval Latin seriosus, from Latin sērius, 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.
Ancestry of “serieux”, step by step
Words derived from “serieux”