Where does “ναί” come from?

ναί (Ancient Greek) comes from Ancient Greek νή, from Proto-Indo-European h₁énos, from Proto-Indo-European h₁é, from Proto-Indo-European ǵʰe — Postpositional intensifying particle: indeed, at any rate, in fact.

ναί (Ancient Greek): yea, verily; yes

Definitions

yea, verily; yes

Ancestry of “ναί”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	νή	by; 430 BCE – 354 BCE, Xenophon, Cyropaedia
2	Proto-Indo-European	h₁énos	that, that over there, yon
3	Proto-Indo-European	h₁é	and, then
4	Proto-Indo-European	ǵʰe	Postpositional intensifying particle: indeed, at any rate, in fact

Words derived from “ναί”

ναι

Every word from Proto-Indo-European ǵʰe →Every word from Proto-Indo-European h₁é →Every word from Proto-Indo-European h₁énos →