acute

/əˈkjuːt/
adjective
  1. Very serious or severe, often used for problems, illnesses, or pain.
    • The company faced an acute financial crisis after the market crash.
    • The patient was admitted to the hospital with acute chest pain.
    • There is an acute shortage of clean water in the region.
  2. Having or showing a quick and sharp mind; perceptive.
    • Dogs have an acute sense of smell.
    • She has an acute sense of hearing and can hear sounds others miss.
    • His acute observations helped solve the mystery.
  3. Describing an angle that is less than 90 degrees.
    • In geometry class, we learned to measure acute angles with a protractor.
    • The ladder leaned against the wall at an acute angle.
    • A triangle with three acute angles is called an acute triangle.
Antonyms
What does "acute" mean? | whatsthatwordmean | whatsthatwordmean