Where does “ǣttor” come from?

ǣttor (Old English) comes from Proto-West Germanic ait(t)r, from Proto-Germanic aitrą, from Proto-Indo-European h₂oyd- — abscess; tumor, abscess.

Ancestry of “ǣttor”, step by step

StepLanguageWordMeaning
1Proto-West Germanicait(t)rpoison; boil, sore
2Proto-Germanicaitrąpoison; pus
3Proto-Indo-Europeanh₂oyd-abscess; tumor, abscess
Every word from Proto-Indo-European h₂oyd- →Every word from Proto-Germanic aitrą →Every word from Proto-West Germanic ait(t)r →
ǣttor — Etymology, Origin & Word History | Etymology Explorer