英语词源字典 - 在线词源网站

acute (adj.)[acute 词源字典]: 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.[acute etymology, acute origin, 英语词源]
hectic (adj.): late 14c., etik (in fever etik), from Old French etique "consumptive," from Late Latin hecticus, from Greek hektikos "continuous, habitual, consumptive" (of a disease, because of the constant fever), from hexis "a habit (of mind or body)," from ekhein "have, hold, continue" (see scheme).

The Latin -h- was restored in English 16c. Sense of "feverishly exciting, full of disorganized activity" first recorded 1904, but hectic also was used in Middle English as a noun meaning "feverish desire, consuming passion" (early 15c.). Hectic fevers are characterized by rapid pulse, among other symptoms. Related: Hecticness.
Petronilla: also Petronella, fem. proper name, a feminine diminutive of Latin Petronius. Also "the name of a saint much-invoked against fevers and regarded as a daughter of St. Peter. The name was accordingly regarded to be a derivative of Peter and became one of the most popular of girls' names, the vernacular Parnell being still used as a proper name as late as the 18th century in Cornwall" [Reaney].
adynamic: "Originally: resulting in or characterized by weakness or debility; specifically designating fevers, especially typhus and typhoid, which have a marked debilitating effect (now rare ). In later use: specifically exhibiting, characterized by, or resulting from reduced or absent muscular contraction", Early 19th cent.; earliest use found in The Monthly Review. From a- + dynamic.