Where does “acervo” come from?

acervo (Latin) comes from Latin acervus, from Proto-Indo-European h₂eḱ- — sharp.

Ancestry of “acervo”, step by step

Step	Language	Word	Meaning
1	Latin	acervus	mass, heap, pile, stack; treasure; cluster
2	Proto-Indo-European	h₂eḱ-	sharp

acervo — Etymology, Origin & Word History | Etymology Explorer