Where does “Πόντος Ἄξεινος” come from?

Πόντος Ἄξεινος (Ancient Greek) comes from Ancient Greek ἄξεινος, from Ancient Greek ἀ-, from Proto-Hellenic hə-, from Proto-Indo-European sm̥-, from Proto-Indo-European sem- — together, one.

Ancestry of “Πόντος Ἄξεινος”, step by step

Πόντος Ἄξεινος traces back through two separate lines of ancestry.

via Ancient Greek ἄξεινος

Step	Language	Word	Meaning
1	Ancient Greek	ἄξεινος	inhospitable, not welcoming to strangers or guests
2	Ancient Greek	ἀ-	The alpha privativum, used to make words that...
3	Proto-Hellenic	hə-	same; together
4	Proto-Indo-European	sm̥-	one; with, together
5	Proto-Indo-European	sem-	together, one

via Ancient Greek Πόντος

Step	Language	Word	Meaning
1	Ancient Greek	Πόντος	Pontus, a region on the southeastern shores of...
2	Proto-Hellenic	*póntos	sea

Words derived from “Πόντος Ἄξεινος”

Every word from Proto-Indo-European sem- →Every word from Ancient Greek ἀ- →Every word from Proto-Indo-European sm̥- →