Where does “at-” come from?

at- (Latin) comes from Latin ad, from Proto-Italic ad, from Proto-Indo-European h₂éd — to, at.

Ancestry of “at-”, step by step

StepLanguageWordMeaning
1Latinadtoward, to; up to; near, by, close by, at, to
2Proto-Italicadtoward, to, on, up to, for
3Proto-Indo-Europeanh₂édto, at

Words derived from “at-”

Every word from Proto-Indo-European h₂éd →Every word from Proto-Italic ad →Every word from Latin ad →