late 14c., "bile, melancholy" (originally the same as choler), from French cholera or directly from Late Latin cholera, from Greek kholera "a type of disease characterized by diarrhea, supposedly caused by bile" (Celsus), from khole "gall, bile," so called for its color, related to khloazein "to be green," khlōros "pale green, greenish-yellow," from PIE root *ghel- (2) "to shine," with derivatives denoting "green, yellow," and thus "bile, gall." But another sense of khole was "drainpipe, gutter."
Revived 1560s in classical sense as a name for a severe digestive disorder (rarely fatal to adults); and 1704 (especially as cholera morbus), for a highly lethal disease endemic in India, periodically breaking out in global epidemics, especially that reaching Britain and America in the early 1830s.
late 14c., "bile," as one of the humors, an excess of which was supposed in old medicine to cause irascibility or temper, from Old French colere "bile, anger," from Late Latin cholera "bile" (see cholera).
c. 1300, melancolie, malencolie, "mental disorder characterized by sullenness, gloom, irritability, and propensity to causeless and violent anger," from Old French melancolie "black bile; ill disposition, anger, annoyance" (13c.), from Late Latin melancholia, from Greek melankholia "sadness," literally (excess of) "black bile," from melas (genitive melanos) "black" (see melano-) + khole "bile" (see cholera).
Old medicine attributed mental depression to unnatural or excess "black bile," a secretion of the spleen and one of the body's four "humors," which help form and nourish the body unless altered or present in excessive amounts. The word also was used in Middle English for "sorrow, gloom" (brought on by love, disappointment, etc.), by mid-14c. As belief in the old physiology of humors faded out in the 18c. the word remained with a sense of "a gloomy state of mind," particularly when habitual or prolonged.
The Latin word also is the source of Spanish melancolia, Italian melancolia, German Melancholie, Danish melankoli, etc. Old French variant malencolie (also in Middle English) is by false association with mal "sickness."
When I go musing all alone,
Thinking of divers things fore-known,
When I build castles in the air,
Void of sorrow and void of fear,
Pleasing myself with phantasms sweet,
Methinks the time runs very fleet.
All my joys to this are folly,
Naught so sweet as melancholy.
When I lie waking all alone,
Recounting what I have ill done,
My thoughts on me then tyrannise,
Fear and sorrow me surprise,
Whether I tarry still or go,
Methinks the time moves very slow.
All my griefs to this are jolly,
Naught so sad as melancholy.
[Robert Burton, from "Anatomy of Melancholy," 17c.]
Proto-Indo-European root meaning "to shine;" it forms words for "gold" (the "bright" metal), words denoting colors, especially "yellow" and "green," also "bile, gall," for its color, and a large group of Germanic gl- words having to do with shining and glittering and, perhaps, sliding. Buck says the interchange of words for yellow and green is "perhaps because they were applied to vegetation like grass, cereals, etc., which changed from green to yellow."
It forms all or part of: arsenic; Chloe; chloral; chloride; chlorinate; chlorine; chloro-; chloroform; chlorophyll; chloroplast; cholecyst; choler; cholera; choleric; cholesterol; cholinergic; Cloris; gall (n.1) "bile, liver secretion;" gild; glad; glance; glare; glass; glaze; glazier; gleam; glee; glib; glide; glimmer; glimpse; glint; glissade; glisten; glister; glitch; glitter; glitzy; gloaming; gloat; gloss (n.1) "glistening smoothness, luster;" glow; glower; gold; guilder; jaundice; melancholic; melancholy; yellow; zloty.
It is the hypothetical source of/evidence for its existence is provided by: Sanskrit harih "yellow, tawny yellow," hiranyam "gold;" Avestan zari "yellow;" Old Persian daraniya-, Avestan zaranya- "gold;" Greek khlōros "greenish-yellow color," kholos "bile, gall, wrath;" Latin helvus "yellowish, bay," Gallo-Latin gilvus "light bay;" Lithuanian geltonas "yellow;" Old Church Slavonic zlutu, Polish żółty, Russian zeltyj "yellow;" Latin galbus "greenish-yellow," fellis "bile, gall;" Lithuanian žalias "green," želvas "greenish," tulžis "bile;" Old Church Slavonic zelenu, Polish zielony, Russian zelenyj "green;" Old Irish glass, Welsh and Breton glas "green," also "gray, blue;" Old English galla "gall, bile," geolu, geolwe, German gelb, Old Norse gulr "yellow;" Old Church Slavonic zlato, Russian zoloto, Old English gold, Gothic gulþ "gold;" Old English glæs "glass; a glass vessel."
mid-14c., colrik, "bilious of temperament or complexion," from Old French colerique, from Late Latin cholericus, from Greek kholerikos, from Greek kholera "a type of disease characterized by diarrhea, supposedly caused by bile," from khole "gall, bile," so called for its color, related to khloazein "to be green," khlōros "pale green, greenish-yellow," from PIE root *ghel- (2) "to shine," with derivatives denoting "green, yellow," and thus "bile, gall." Meaning "easily angered, hot-tempered" is from 1580s (from the supposed effect of excess choler); that of "pertaining to cholera" is from 1834.
"morbid fear of heights," 1887, medical Latin, from Greek akros "at the end, topmost" (from PIE root *ak- "be sharp, rise (out) to a point, pierce") + -phobia "fear." Coined by Italian physician Dr. Andrea Verga in a paper describing the condition, from which Verga himself suffered.
In this paper, read somewhat over a year ago at the congress of alienists at Pavia, the author makes confession of his own extreme dread of high places. Though fearless of the contagion of cholera, he has palpitations on mounting a step-ladder, finds it unpleasant to ride on the top of a coach or to look out of even a first-story window, and has never used an elevator. [abstract of Verga's report in American Journal of Psychology, November 1888]