Where does “autompne” come from?

autompne (Old French) comes from Latin autumnus, from Latin auctumnus, from Proto-Indo-European h₃ewǵ- — cold.

Ancestry of “autompne”, step by step

StepLanguageWordMeaning
1Latinautumnusautumn, fall; autumn; autumnal
2Latinauctumnusautumn; autumn; autumnal
3Proto-Indo-Europeanh₃ewǵ-cold
Every word from Proto-Indo-European h₃ewǵ- →Every word from Latin auctumnus →Every word from Latin autumnus →