cholerayoudaoicibaDictYouDict[cholera 词源字典]
cholera: [14] Greek kholéra originally meant ‘illness caused by choler, bilious attack’; it was a derivative of kholé ‘bile’ (which is related to English gall). Passing into Latin as cholera, it began to be used for ‘bile’ itself, both in the physiological sense and as representing one of the four ancient humours, ‘anger’. It had that sense when first adopted into English, and into French, where it became colère (source of English choler [14]).

It was revived as a term for a severe digestive disorder, involving vomiting, diarrhoea, etc, in the 17th century, and in the 19th century was applied (from the similarity of the symptoms) to the often fatal infectious disease caused by the bacterium Vibrio comma.
=> gall, melancholy[cholera etymology, cholera origin, 英语词源]
cholera (n.)youdaoicibaDictYouDict
late 14c., "bile, melancholy" (originally the same as choler), from Middle French cholera or directly from Late Latin cholera, from Greek kholera "a type of disease characterized by diarrhea, supposedly caused by choler" (Celsus), from khole "gall, bile," from khloazein "to be green," from khloros (see Chloe). 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.