Where does “ena” come from?

ena (Ladin) comes from Latin hebdomas, from Ancient Greek ἑβδομάς, from Ancient Greek ἑπτά, from Proto-Hellenic heptə́, from Proto-Indo-European septḿ̥ — seven.

ena (Ladin): week

Definitions

week

Ancestry of “ena”, step by step

Step	Language	Word	Meaning
1	Latin	hebdomas	the number seven; seven days; a week; the seventh...
2	Ancient Greek	ἑβδομάς	A group of seven, "especially" a week of seven...
3	Ancient Greek	ἑπτά	seven
4	Proto-Hellenic	heptə́	seven
5	Proto-Indo-European	septḿ̥	seven

Every word from Proto-Indo-European septḿ̥ →Every word from Proto-Hellenic heptə́ →Every word from Ancient Greek ἑπτά →