Where does “*subīliō” come from?

*subīliō (Vulgar Latin) comes from Latin ile, from Ancient Greek εἰλεός, from Ancient Greek εἰλέω, from Proto-Indo-European wēlH-, from Proto-Indo-European welH- — to turn, to wind.

Ancestry of “*subīliō”, step by step

*subīliō traces back through two separate lines of ancestry.

via Latin ile

Step	Language	Word	Meaning
1	Latin	ile	intestines, guts
2	Ancient Greek	εἰλεός	intestinal obstruction, ileus; den, hole;...
3	Ancient Greek	εἰλέω	to assemble; to turn, wind; to press together
4	Proto-Indo-European	wēlH-	to roll, to undulate
5	Proto-Indo-European	welH-	to turn, to wind

via Latin sub

Step	Language	Word	Meaning
1	Latin	sub	under, beneath; behind; at the feet of
2	Proto-Italic	supo	under
3	Proto-Indo-European	upó	under, below
4	Proto-Indo-European	h₃ewp-	—

Every word from Proto-Indo-European welH- →Every word from Proto-Indo-European wēlH- →Every word from Ancient Greek εἰλέω →