Where does “agrumi” come from?

agrumi (Slovene) comes from Italian agrume, from Medieval Latin acrumen, from Latin acer, from Proto-Italic akris, from Proto-Indo-European *h₂eḱrós, from Proto-Indo-European h₂eḱ- — sharp.

agrumi (Slovene): citrus

Definitions

citrus

Ancestry of “agrumi”, step by step

Step	Language	Word	Meaning
1	Italian	agrume	citrus
2	Medieval Latin	acrumen	—
3	Latin	acer	sharp, sour, bitter, pungent; keen, sharp, acute,...
4	Proto-Italic	akris	sharp; sour-tasting
5	Proto-Indo-European	*h₂eḱrós	sharp
6	Proto-Indo-European	h₂eḱ-	sharp

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