Where does “aysel” come from?

aysel (Middle English) comes from Middle English aisel, from Old French aisil, from Late Latin acetillum, from Latin acētum, from French -ate, from Latin -ātus, from Proto-Italic -ātos, from Proto-Indo-European -éh₂tos — Forms adjectives from nouns, indicating the possession of a thing or a quality.

Ancestry of “aysel”, step by step

Step	Language	Word	Meaning
1	Middle English	aisel	—
2	Old French	aisil	—
3	Late Latin	acetillum	—
4	Latin	acētum	vinegar
5	French	-ate	ate
6	Latin	-ātus	ed
7	Proto-Italic	-ātos	—
8	Proto-Indo-European	-éh₂tos	Forms adjectives from nouns, indicating the possession of a thing or a quality

Every word from Proto-Indo-European -éh₂tos →Every word from Latin -ātus →Every word from French -ate →