Where does “*ἐρεβνός” come from?

*ἐρεβνός (Ancient Greek) comes from Ancient Greek Ἔρεβος, from Proto-Indo-European h₁régʷos, from Proto-Indo-European -os — Creates action nouns or result nouns from verbs;...

Ancestry of “*ἐρεβνός”, step by step

StepLanguageWordMeaning
1Ancient GreekἜρεβοςErebus; Darkness; Lower Air
2Proto-Indo-Europeanh₁régʷosdarkness
3Proto-Indo-European-osCreates action nouns or result nouns from verbs;...
Every word from Proto-Indo-European -os →Every word from Proto-Indo-European h₁régʷos →Every word from Ancient Greek Ἔρεβος →