Where does “ось” come from?

ось (Old East Slavic) comes from Proto-Slavic osь, from Proto-Balto-Slavic aśís, from Proto-Indo-European h₂eḱs-, from Proto-Indo-European h₂eǵ- — to drive.

Ancestry of “ось”, step by step

StepLanguageWordMeaning
1Proto-Slavicosьaxis, axle
2Proto-Balto-Slavicaśísaxle, axis
3Proto-Indo-Europeanh₂eḱs-axis, axle
4Proto-Indo-Europeanh₂eǵ-to drive

Words derived from “ось”

Every word from Proto-Indo-European h₂eǵ- →Every word from Proto-Indo-European h₂eḱs- →Every word from Proto-Balto-Slavic aśís →