"ACUTE"

ACUTE
(Adjective)
Meaning:

• sharp, shrewed,extremely sharp or intense
• Keenly perceptive or discerning
• Geometry : of an angle; less than 90 degrees; Having an acute angle: an acute triangle.
• Medicine: Having a rapid onset and following a short but severe course: acute disease. (Use this word only in figurative sense.... see image A Sharp Pain can be Called "Acute Pain" but a Sharp Knife can not")