Where does “treateth” come from?

treateth (English) comes from English treat, from Middle English treten, from Old French tretier, from Latin tractāre, from Latin tractō, from Latin -tō, from Latin -tus, from Proto-Italic -tus — Derives action nouns from verb roots.

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

Definitions

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

Ancestry of “treateth”, step by step

treateth traces back through two separate lines of ancestry.

via English treat

StepLanguageWordMeaning
1EnglishtreatTo negotiate, discuss terms, bargain; To...
2Middle Englishtreten—
3Old Frenchtretier—
4Latintractāre—
5Latintractōto tug, drag or haul
6Latin-tōForms here
7Latin-tusForms the past participle of verbs; Forms...
8Proto-Italic-tus—
9Proto-Indo-European-tusDerives action nouns from verb roots

via English eth

StepLanguageWordMeaning
1EnglishethA letter introduced into Old English to...
Every word from Proto-Indo-European -tus →Every word from Latin -tus →Every word from Latin -tō →