acumen
sharp practical judgment
Root
- acer / acu / acr: sharp, pointed, keen, or bitter
Other words with the acer / acu / acr root
Acumen is mental sharpness: the point of the needle moved into judgment.
Her business acumen helped her see the flawed deal before the numbers made it obvious.
Acumen turns physical sharpness into mental sharpness. The image is a point, needle, or edge; the exam meaning is keen practical judgment.