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darnel (n.)[darnel 词源字典]: weed growing in grainfields, c. 1300, from northern dialectal French darnelle; according to one theory, the the second element is Old French neelle (Modern French nielle) "cockle," from Vulgar Latin nigella "black-seeded," from fem. of Latin nigellus "blackish."

But perhaps rather the word is related to Middle Dutch verdaernt, verdarnt "stunned, dumbfounded, angry," Walloon darne, derne "stunned, dazed, drunk," the plant so called from its well-known inebriating property. Long noted for its "poisonous" properties (actually caused by fungus growing on the plant); The French word for it is ivraie, from Latin ebriacus "intoxicated," and the botanical name, Lolium temulentum, is from Latin temulent "drunken," though this sometimes is said to be "from the heavy seed heads lolling over under their own weight."
In some parts of continental Europe it appears the seeds of darnel have the reputation of causing intoxication in men, beasts, and birds, the effects being sometimes so violent as to produce convulsions. In Scotland the name of Sleepies, is applied to darnel, from the seeds causing narcotic effects. [Gouverneur Emerson, "The American Farmer's Encyclopedia," New York, 1860. It also mentions that "Haller speaks of them as communicating these properties to beer."]
[darnel etymology, darnel origin, 英语词源]
sardonic (adj.): "apparently but not really proceeding from gaiety," 1630s, from French sardonique (16c.), from Latin sardonius (but as if from Latin *sardonicus) in Sardonius risus, loan-translation of Greek sardonios (gelos) "of bitter or scornful (laughter)," altered from Homeric sardanios (of uncertain origin) by influence of Sardonios "Sardinian," because the Greeks believed that eating a certain plant they called sardonion (literally "plant from Sardinia," see Sardinia) caused facial convulsions resembling those of sardonic laughter, usually followed by death. For nuances of usage, see humor. Earlier in same sense sardonian (1580s), from Latin sardonius. Related: Sardonically.
shaker (n.): mid-15c., "one who or which shakes," agent noun from shake (v.). Applied from 1640s (with capital initial) to various Christian sects whose devotional exercises often involved convulsions. The best-known, the American-based "Society of Believers in Christ's Second Appearing;" so called from 1784; the adjective with reference to furniture styles associated with these Shakers is recorded from 1866. Meaning "container for mixing cocktails, etc." is recorded from 1868. Phrase movers and shakers is attested from 1874.
upheaval (n.): 1834 in reference to convulsions in society; 1836 in geology, from verb upheave (c. 1300, from up (adv.) + heave (v.)) + -al (2). Similarly formed verbs are Old Frisian upheva, Old High German ufhevan, German aufheben.