Where does “ieiunus” come from?

ieiunus (Latin) comes from Latin iaiūnus, from Proto-Italic jagjūnos, from Proto-Indo-European Hyeh₂ǵ-yu-, from Proto-Indo-European Hyeh₂ǵ-ye/o- — to sacrifice.

Ancestry of “ieiunus”, step by step

Step	Language	Word	Meaning
1	Latin	iaiūnus	—
2	Proto-Italic	jagjūnos	—
3	Proto-Indo-European	Hyeh₂ǵ-yu-	—
4	Proto-Indo-European	Hyeh₂ǵ-ye/o-	to sacrifice

Every word from Proto-Indo-European Hyeh₂ǵ-ye/o- →

ieiunus — Etymology, Origin & Word History | Etymology Explorer