Where does “eta abar” come from?

eta abar (Basque) comes from Basque eta, from Latin et, from Proto-Indo-European éti, from Proto-Indo-European h₁é, from Proto-Indo-European ǵʰe — Postpositional intensifying particle: indeed, at any rate, in fact.

eta abar (Basque): et cetera and so on

Definitions

et cetera and so on

Ancestry of “eta abar”, step by step

eta abar traces back through two separate lines of ancestry.

via Basque eta

Step	Language	Word	Meaning
1	Basque	eta	and; plus, and; upon, after
2	Latin	et	and; plus; though, even if
3	Proto-Indo-European	éti	beyond; over
4	Proto-Indo-European	h₁é	and, then
5	Proto-Indo-European	ǵʰe	Postpositional intensifying particle: indeed, at any rate, in fact

via Basque abar

Step	Language	Word	Meaning
1	Basque	abar	small branch

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