Where does “ayde” come from?

ayde (Middle English) comes from Old French aide, from Old French aidier, from Latin adiūtō, from Latin -tō, from Latin -tus, from Proto-Italic -tus, from Proto-Indo-European -tus — Derives action nouns from verb roots.

Ancestry of “ayde”, step by step

ayde traces back through two separate lines of ancestry.

via Old French aide

StepLanguageWordMeaning
1Old Frenchaidehelp; assistance; aid
2Old Frenchaidierto help
3Latinadiūtōto help, serve, assist
4Latin-tōForms here
5Latin-tusForms the past participle of verbs; Forms...
6Proto-Italic-tus
7Proto-Indo-European-tusDerives action nouns from verb roots

via Old French eide

StepLanguageWordMeaning
1Old Frencheide
Every word from Proto-Indo-European -tusEvery word from Latin -tusEvery word from Latin -tō