Acute
Severe
Synonyms: Severe, drastic, dreadful, awful, bad, profound, pressing, all-important, dangerous, perilous, life-threatening, parlous, critical, dire, terrible, grave, serious, urgent, desperate, vital, hazardous, precarious, life-and-death, and egregious.
Stabbing
Synonyms: Stabbing, penetrating, sharp, racking, burning, fierce, intense, extreme, agonizing, hellish, tormenting, insufferable, more than one can bear, short-lasting, short and sharp, shooting, piercing, keen, searing, consuming, ferocious, severe, excruciating, grievous, torturous, unbearable, unendurable, exquisite, and peracute.
Astute
Synonyms: Astute, sharp, razor-sharp, quick, agile, ingenious, intelligent, brilliant, canny, discerning, perspicacious, insightful, piercing, sagacious, judicious, quick off the mark, brainy, savvy, pawky, whip-smart, argute, shrewd, sharp-witted, rapier-like, quick-witted, nimble, clever, bright, smart, intuitive, perceptive, penetrating, incisive, discriminating, wise, on the ball, quick on the uptake, streetwise, suss, heads-up, long-headed, and sapient.
Keen
Example Sentences
He felt acute pain in his leg.
The patient has an acute infection.
She showed acute awareness of the situation.
The problem is becoming acute.
Acute angles measure less than 90 degrees.
The crisis required acute attention.
He experienced acute stress before the exam.
The doctor diagnosed an acute illness.
The acute shortage of supplies worried everyone.
Her acute sense of hearing helped detect danger.