acute
a-cute
adjective
(Of an angle) measuring less than 90 degrees.
"An acute angle is smaller than a right angle."
adjective
Extremely severe or intense, often of a problem or feeling.
"The country faced an acute housing shortage."
adjective
Having or showing a highly developed sensitivity or understanding.
"Dogs have an acute sense of smell."
adjective
(Of a disease) severe but of short duration.
"He was diagnosed with acute appendicitis."
Thesaurus
Synonyms: subacute, ague, acute accent, sharp, acuate, pointed, needlelike, keen, penetrating, perceptive, incisive, knifelike