Where does “acérrimo” come from?

acérrimo (Spanish) comes from Latin acerrimus, from Latin acer, from Proto-Italic akris, from Proto-Indo-European *h₂eḱrós, from Proto-Indo-European h₂eḱ- — sharp.

acérrimo (Spanish): very strong; vigorous; with tenacity; die-hard,...

Definitions

very strong; vigorous; with tenacity; die-hard,...

Ancestry of “acérrimo”, step by step

Step	Language	Word	Meaning
1	Latin	acerrimus	sharpest; bitterest
2	Latin	acer	sharp, sour, bitter, pungent; keen, sharp, acute,...
3	Proto-Italic	akris	sharp; sour-tasting
4	Proto-Indo-European	*h₂eḱrós	sharp
5	Proto-Indo-European	h₂eḱ-	sharp

Words derived from “acérrimo”

acérrimamente

Every word from Proto-Indo-European h₂eḱ- →Every word from Proto-Indo-European *h₂eḱrós →Every word from Proto-Italic akris →