Where does “acrumen” come from?

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

Ancestry of “acrumen”, step by step

StepLanguageWordMeaning
1Latinacersharp, sour, bitter, pungent; keen, sharp, acute,...
2Proto-Italicakrissharp; sour-tasting
3Proto-Indo-European*h₂eḱróssharp
4Proto-Indo-Europeanh₂eḱ-sharp

Words derived from “acrumen”

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