Where does “sealeth” come from?

sealeth (English) comes from English seal, from Middle English sel, from Anglo-Norman sëel, from Latin sigillum, from Latin -lus, from Proto-Italic -elos, from Proto-Indo-European -e-lós, from Proto-Indo-European -lós — Forms agent nouns from verbal roots.

sealeth (English): Third-person singular simple present indicative...

Definitions

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

Ancestry of “sealeth”, step by step

sealeth traces back through two separate lines of ancestry.

via English seal

StepLanguageWordMeaning
1EnglishsealA pinniped (Pinnipedia), particularly an earless seal (true seal) or eared seal
2Middle EnglishselGood fortune, prosperity, luck
3Anglo-Normansëel
4Latinsigillumfigurine, statuette; seal
5Latin-lusAlternative form of -ulus; diminutive suffix
6Proto-Italic-elosForms desubstantival and deadjectival diminutive nouns
7Proto-Indo-European-e-lós
8Proto-Indo-European-lósForms agent nouns from verbal roots

via English eth

StepLanguageWordMeaning
1EnglishethA letter introduced into Old English to...
Every word from Proto-Indo-European -lós