acute
Pronunciation: /əˈkjuːt/
adjective
- 1(of an unpleasant or unwelcome situation or phenomenon) present or experienced to a severe or intense degree: an acute housing shortage the problem is acute and getting worse
- (of a disease or its symptoms) severe but of short duration: acute appendicitisOften contrasted with chronic.
- denoting or designed for patients with an acute form of a disease: an acute ward acute patients
noun
- short for acute accent.

Origin:
late Middle English (describing a disease or its symptoms): from Latin acutus, past participle of acuere 'sharpen', from acus 'needle'