Where does “etiamtunc” come from?

etiamtunc (Latin) comes from Latin etiam, 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.

etiamtunc (Latin): Alternative form of etiamtum

Definitions

Alternative form of etiamtum

Ancestry of “etiamtunc”, step by step

etiamtunc traces back through two separate lines of ancestry.

via Latin etiam

Step	Language	Word	Meaning
1	Latin	etiam	and also, and furthermore, also, likewise,...
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 Latin tunc

Step	Language	Word	Meaning
1	Latin	tunc	then, "in its senses as"; from then on: from that...
2	Latin	tum	then, thereupon; at the time, at that time, then;...
3	Proto-Indo-European	tóm	—
4	Proto-Indo-European	só	this; that

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