either … or · otherwise … or else · Introduces a correction to the previous words or an afterthought remark.
köken: From Proto-Italic *auti, from Proto-Indo-European *h₂ewti (“on the other hand”), from *h₂ew. Cognate with autem, Ancient Greek αὖ (aû), αὖτε (aûte), αὐτός (autós), αὐτάρ (autár).
nemo tribunos aut plebem timebat
[…] et aut ego indigna fuī illīs aut illī mihi forsitan dignī nōn fuērunt.