Where does “etiam” come from?

etiam (Interlingua) 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.

etiam (Interlingua): also, too

Definitions

also, too

Ancestry of “etiam”, step by step

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

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