Where does “sustaineth” come from?

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

sustaineth (English): third-person singular simple present indicative...

Definitions

  1. third-person singular simple present indicative...

Ancestry of “sustaineth”, step by step

sustaineth traces back through two separate lines of ancestry.

via English sustain

StepLanguageWordMeaning
1EnglishsustainTo maintain, or keep in existence; To provide for...
2Middle Englishsusteinen
3Old Frenchsustenirto hold up; to support; to support; to sustain
4Vulgar Latinsustenire
5LatinsustineoI hold up or upright, uphold, keep up, bear up,...
6Latinsub-under, sub
7Proto-Indo-Europeanupóunder, below
8Proto-Indo-Europeanh₃ewp-

via English eth

StepLanguageWordMeaning
1EnglishethA letter introduced into Old English to...
Every word from Proto-Indo-European h₃ewp-Every word from Proto-Indo-European upóEvery word from Latin sub-
sustaineth — Etymology, Origin & Word History | Etymology Explorer