1560s, "act of vegetating," from French végétation and directly from Medieval Latin vegetationem (nominative vegetatio) "a quickening, action of growing," from vegetare "grow, quicken" (see vegetable). Meaning "plant life" first recorded 1727.
"tangled and lying flat" (of hair, vegetation, fibers, etc.), 1610s, past-participle adjective from mat (v.).
"wet, soft, spongy ground with soil chiefly composed of decaying vegetable matter," c. 1500, from Gaelic and Irish bogach "bog," from adjective bog "soft, moist," from Proto-Celtic *buggo- "flexible," from PIE root *bheug- "to bend." Bog-trotter applied to the wild Irish from 1670s.
A bog is characterized by vegetation, decayed and decaying, and a treacherous softness. A quagmire or quag is the worst kind of bog or slough; it has depths of mud, and perhaps a shaking surface. A slough is a place of deep mud and perhaps water, but generally no vegetation. [Century Dictionary]
1580s, "green in color; green with vegetation," from French virdeant "becoming green," present participle of Old French verdeiier "become green," from Vulgar Latin *viridiare "grow green, make green," from Latin viridis "green" (see verdure). Related: Verdantly; verdancy.
personification of the west wind in Roman mythology, from Latin Favonius, which de Vaan suggests is cognate with the god-name Faunus (see faun), from a prehistoric noun meaning "who favors" (see favor (n.)):
This also yields a good semantic motivation: the wind that stimulates vegetation can be called favourable. Favonius was regarded by the Romans as the herald of spring and the start of new vegetation (e.g. Cato Agr. 50.1, Cicero Ver. 5.27, Lucretius 1.11, Vitruvius 2.9.1).
The Latin word is the source (via Old High German phonno, 10c., via Vulgar Latin contraction *faonius) of German Föhn "warm, dry wind blowing down Alpine valleys." Related: Favonian.
Old English drugaþ, drugoþ "continuous dry weather injurious to vegetation, dryness," from Proto-Germanic *drugothaz, from Germanic root *dreug- "dry" with *-itho, Germanic suffix for forming abstract nouns. See dry (adj.) + -th (2), and compare high/height, etc. Drouth was a Middle English variant continued in Scottish and northern English dialect and in poetry.
"a pinch; a sharp bite," 1540s, from nip (v.). Sense of "a small bit of anything, fragment or bit pinched off" is from c. 1600. Meaning "a chill in the weather" is from 1610s, probably so called for its effect on vegetation. Nip and tuck "a close thing," especially a close approach to equality in the results of a horse race or any competition, is recorded by 1847, American English, perhaps an image from sailing or tailoring.
Extended by 1849 to other places overgrown by vegetation in a wild, tangled mass. Figurative sense "wild, tangled mass" of anything is from 1850. Meaning "place notoriously lawless and violent" is first recorded 1906, from Upton Sinclair's novel. Meaning "hobo camp" is from 1908. Asphalt jungle (1949) is from William R. Burnett's novel title, made into a film 1950 by John Huston; blackboard jungle (1954) is from Evan Hunter's novel title and 1955 movie.
Jungle fever "remittent malignant fever prevalent in India and tropical regions" is from 1803. Jungle gym appears in advertisements from 1921, originally one word, made by Junglegym Inc., Chicago, U.S. Jungle bunny, derogatory for "black person," attested from 1966.