Where does “yvierno” come from?
yvierno (Old Spanish) comes from Vulgar Latin invernum, from Latin hibernum, from Latin hibernus, from Proto-Italic heimrinos, from Proto-Indo-European ǵʰey-m-r-ino-s, from Proto-Indo-European ǵʰey- — winter.
Ancestry of “yvierno”, step by step
Words derived from “yvierno”