Where does “supporten” come from?

supporten (Middle English) comes from Old French supporter, from Latin supportō, from Latin sub-, from Proto-Indo-European upó, from Proto-Indo-European h₃ewp-.

Ancestry of “supporten”, step by step

Step	Language	Word	Meaning
1	Old French	supporter	—
2	Latin	supportō	to carry, bring, convey or transport
3	Latin	sub-	under, sub
4	Proto-Indo-European	upó	under, below
5	Proto-Indo-European	h₃ewp-	—

Every word from Proto-Indo-European h₃ewp- →Every word from Proto-Indo-European upó →Every word from Latin sub- →