Old English feferfuge, from Late Latin febrifugia, from Latin febris "fever" + fugare "put to flight" (see febrifuge). So called for its medical usage. The modern English word probably is reborrowed from an Anglo-French source.
late 14c., etik (in fever etik "hectic fever"), from Old French etique "consumptive," from Late Latin hecticus, from Greek hektikos "continuous, habitual," also used of slow, continued diseases or fevers. The Greek adjective is from hexis "a habit (of mind or body)," from ekhein "have, hold, continue" (from PIE root *segh- "to hold"). The Latin -h- was restored in English 16c.
The use of the word by the Greek physicians apparently was from the notion of a fever rooted in the constitution of the body and symptomatic of one's physical condition, or else from its continuousness (compare ephemera). Hectic fevers are characterized by rapid pulse, flushed cheeks, hot skin, emaciation. In English applied particularly to the wasting fevers, rising and falling with the hours of the day, characteristic of tuberculosis.
Sense of "feverishly exciting, full of disorganized activity" is from 1904 and was a vogue word at first, according to Fowler, but hectic also was used in Middle English as a noun meaning "feverish desire, consuming passion" (early 15c.). Related: Hecticness.
1740, "unwholesome air, air contaminated with the poison producing intermittent and remittent fever," from Italian mal'aria, from mala aria, literally "bad air," from mala "bad" (fem. of malo, from Latin malus; see mal-) + aria "air" (see air (n.1)). Probably first used by Italian physician Francisco Torti (1658-1741). By 1866 it had come to be used of the disease itself (earlier malaria fever, by 1814). The disease, now known to be mosquito-borne, once was thought to be caused by foul air in marshy districts. Replaced native ague.
1703, "wandering in the mind, affected with delirium" (as a result of fever or illness), from stem of delirium + -ous. The earlier adjective was delirous (1650s). Figurative sense of "characterized by or proceeding from wild excitement or exaggerated emotion" is by 1791. Related: Deliriously; deliriousness.
c. 1400, from Latin tepidus "lukewarm," from tepere "be moderately warm," from PIE root *tep- "to be hot" (source also of Sanskrit tapati "makes warm, heats, burns," tapas "heat, austerity;" Avestan tafnush "fever;" Old Church Slavonic topiti "to warm," teplu "warm;" Old Irish tene "fire;" Welsh tes "heat"). Related: Tepidly; tepidity.
type of infectious disease, now known to be caused by a virus, usually occurring as an epidemic, with symptoms similar to a severe cold along with high fever and rapid prostration, 1743, borrowed (during an outbreak of the disease in Europe), from Italian influenza "influenza, epidemic," originally "visitation, influence (of the stars)," from Medieval Latin influentia in the astrological sense (see influence).
AN Article from Rome informs us that a Sort of Plague has broke out there, which destroys Abundance of their People, and they call it the Influenza. [The Gentleman's Magazine, April 1743]
Used in Italian for diseases at least since 1504 (as in influenza di febbre scarlattina "scarlet fever") on notion of astral, occult, or atmospheric influence. The 1743 outbreak began in Italy. Often applied since mid-19c. to severe colds. For the sense development, compare Latin sideratio "blast, blight, palsy," from siderari "to be planet-struck, afflicted as if by an evil star."
late 14c., "festering gangrenous, in a state of decay," from Old French putride and directly from Latin putridus, from putrere "to rot," from putris "rotten, crumbling," related to putere "to stink," from PIE root *pu- (2) "to rot, stink" (see pus). First in reference to putrid fever, an old name for typhus (also known in Middle English as putrida), which supposedly was caused by putrefaction of bodily humors. Related: Putridness.
1800, literally "resembling typhus," from typhus + -oid. The noun is from 1861, a shortened form of typhoid fever (1845), so called because it originally was thought to be a variety of typhus. Typhoid Mary (1909) was Mary Mallon (d.1938), a typhoid carrier who worked as a cook and became notorious after it was learned she unwittingly had infected hundreds in U.S.
early 15c., "apply hot liquids," from Old French fomenter "apply hot compress (to a wound)" (13c.), from Late Latin fomentare, from Latin fomentum "warm application, poultice," contraction of *fovimentum, from fovere "to warm; cherish, encourage" (see fever). Extended sense of "stimulate, instigate" (1620s), on the notion of "encourage the growth of," as if by heat, probably was taken from French. Related: Fomented; fomenting.