Where does “hendiadys” come from?

hendiadys (Medieval Latin) comes from Ancient Greek ἕν, from Ancient Greek εἷς, from Proto-Hellenic hens, from Proto-Indo-European sḗm, from Proto-Indo-European sem- — together, one.

Ancestry of “hendiadys”, step by step

hendiadys traces back through 3 separate lines of ancestry.

via Ancient Greek ἕν

StepLanguageWordMeaning
1Ancient Greekἕνneuter nominative/accusative/vocative singular of...
2Ancient Greekεἷςone
3Proto-Hellenichenscardinal number 1 Previous: n/a Next: *dúwō;...
4Proto-Indo-Europeansḗmone
5Proto-Indo-Europeansem-together, one

via Ancient Greek διά

StepLanguageWordMeaning
1Ancient Greekδιάthroughout
2Proto-Indo-Europeandwístwice, doubly; in two
3Proto-Indo-Europeandwóh₁two

via Ancient Greek δύο

StepLanguageWordMeaning
1Ancient Greekδύοtwo
2Proto-Hellenic*dúwotwo

Words derived from “hendiadys

Every word from Proto-Indo-European sem-Every word from Proto-Indo-European sḗmEvery word from Proto-Hellenic hens