He lifted his head suddenly, thinking, in his superacute state of mind, that he had heard a noise.
late 14c., originally of fevers and diseases, "coming and going quickly" (opposed to a chronic), from Latin acutus "sharp, pointed," figuratively "shrill, penetrating; intelligent, cunning," past participle of acuere "sharpen" (see acuity). Meaning "sharp, irritating" is from early 15c. Meaning "intense" is from 1727. Related: Acutely; acuteness.
superacute su·per·a·cute (sōō'pər-ə-kyōōt')
Marked by great severity of symptoms and rapid progress; extremely acute. Used of the course of a disease.
acute a·cute (ə-kyōōt')
Pointed at the end; sharp.
Of or relating to a disease or a condition with a rapid onset and a short, severe course.
Of or relating to a patient afflicted with such a disease.