Where does “at” come from?

at (Proto-Balto-Slavic) comes from Proto-Indo-European h₁óti, from Proto-Indo-European h₁éti.

Ancestry of “at”, step by step

StepLanguageWordMeaning
1Proto-Indo-Europeanh₁óti—
2Proto-Indo-Europeanh₁éti—
Every word from Proto-Indo-European h₁éti →Every word from Proto-Indo-European h₁óti →