Where does “traiteuse” come from?

traiteuse (French) comes from French traiter, from Middle French traicter, from Old French traiter, from Latin tractāre, from Latin tractō, from Latin -tō, from Latin -tus, from Proto-Italic -tus — Derives action nouns from verb roots.

Ancestry of “traiteuse”, step by step

StepLanguageWordMeaning
1Frenchtraiterto treat; to take care; to process, spray, coat
2Middle Frenchtraicterto treat
3Old Frenchtraiter
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
Every word from Proto-Indo-European -tusEvery word from Latin -tusEvery word from Latin -tō