Where does “alimentarius” come from?

alimentarius (Late Latin) comes from Latin alimentum, from Latin alō, from Proto-Italic alō, from Proto-Indo-European h₂életi, from Proto-Indo-European h₂el- — to grow, nourish; beyond, other; to wander, roam.

Ancestry of “alimentarius”, step by step

Step	Language	Word	Meaning
1	Latin	alimentum	food, nourishment, sustenance; obligation to...
2	Latin	alō	to feed, to nourish, to nurture
3	Proto-Italic	alō	—
4	Proto-Indo-European	h₂életi	to be nourishing
5	Proto-Indo-European	h₂el-	to grow, nourish; beyond, other; to wander, roam

Every word from Proto-Indo-European h₂el- →Every word from Proto-Indo-European h₂életi →Every word from Proto-Italic alō →