acute
Definitions
Present or experienced to a severe or intense degree.
Having or showing a perceptive understanding or insightful discernment.
Relating to an angle less than 90 degrees.
Examples
The patient was rushed to the hospital after suffering from acute abdominal pain.
She has an acute sense of hearing and can detect the slightest sound in the room.
There is an acute shortage of clean water in the drought-stricken region.