Where does “se sustenter” come from?

se sustenter (French) comes from French sustenter, from Latin sustento, from Latin sustineo, from Latin sub-, from Proto-Indo-European upó, from Proto-Indo-European h₃ewp-.

se sustenter (French): pronominal version of sustenter: to eat, to take sustenance

Definitions

pronominal version of sustenter: to eat, to take sustenance

Ancestry of “se sustenter”, step by step

se sustenter traces back through two separate lines of ancestry.

via French sustenter

Step	Language	Word	Meaning
1	French	sustenter	eat, to take sustenance
2	Latin	sustento	I uphold, support, prop or sustain; I endure or...
3	Latin	sustineo	I hold up or upright, uphold, keep up, bear up,...
4	Latin	sub-	under, sub
5	Proto-Indo-European	upó	under, below
6	Proto-Indo-European	h₃ewp-	—

via French se

Step	Language	Word	Meaning
1	French	se	The third-person reflexive and reciprocal direct...
2	Middle French	se	The third-person reflexive and reciprocal direct...
3	Old French	se	himself; herself; itself
4	Latin	sē	without
5	Proto-Indo-European	swé	self

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