Where does “soubtenir” come from?

soubtenir (Middle French) comes from Old French sustenir, from Vulgar Latin sustenire, from Latin sustineo, from Latin sub-, from Proto-Indo-European upó, from Proto-Indo-European h₃ewp-.

Ancestry of “soubtenir”, step by step

soubtenir traces back through two separate lines of ancestry.

via Old French sustenir

StepLanguageWordMeaning
1Old Frenchsustenirto hold up; to support; to support; to sustain
2Vulgar Latinsustenire
3LatinsustineoI hold up or upright, uphold, keep up, bear up,...
4Latinsub-under, sub
5Proto-Indo-Europeanupóunder, below
6Proto-Indo-Europeanh₃ewp-

via Old French soustenir

StepLanguageWordMeaning
1Old Frenchsoustenirto keep up; to sustain; to bear
Every word from Proto-Indo-European h₃ewp-Every word from Proto-Indo-European upóEvery word from Latin sub-