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dynamic (n.)[dynamic 词源字典]: "energetic force; motive force," 1894, from dynamic (adj.).[dynamic etymology, dynamic origin, 英语词源]
dynamics (n.): as a branch of physics, 1789, from dynamic (adj.); also see -ics.
dynamism (n.): 1831, "dynamic energy, force, drive," from Greek dynamis "power, might, strength" (see dynamic (adj.)) + -ism. As a philosophical system, from 1857.
dynamite (n.): 1867, from Swedish dynamit, coined 1867 by its inventor, Swedish chemist Alfred Nobel (1833-1896), from Greek dynamis "power" (see dynamic (adj.)) + -ite (2). Figurative sense of "something potentially dangerous" is from 1922. Positive sense of "dynamic and excellent" by mid-1960s, perhaps originally Black English.
dynamite (v.): 1881, from dynamite (n.). Related: Dynamited; dynamiting.
dynamo (n.): 1882, short for dynamo-machine, from German dynamoelektrischemaschine "dynamo-electric machine," coined 1867 by its inventor, German electrical engineer Werner Siemans (1816-1892), from Greek dynamis "power."
dynast (n.): "hereditary ruler," 1630s, from Late Latin dynastes, from Greek dynastes (see dynasty).
dynastic (adj.): 1800; see dynasty + -ic.
dynasty (n.): mid-15c. (earlier dynastia, late 14c.), from Middle French dynastie and directly from Late Latin dynastia, from Greek dynasteia "power, lordship, sovereignty," from dynastes "ruler, chief," from dynasthai "have power."
dyne (n.): metric unit of force, 1873, from German use of Greek dynamis "power" (see dynamic (adj.)); perhaps also influenced by French dyne, which had been proposed c. 1842 as a unit of force in a different sense.
dys-: word-forming element meaning "bad, ill, abnormal," from Greek dys-, inseparable prefix "destroying the good sense of a word or increasing its bad sense" [Liddell & Scott], "bad, hard, unlucky," from PIE root (and prefix) *dus- "bad, ill, evil" (cognates: Sanskrit dus-, Old Persian duš- "ill," Old English to-, Old High German zur-, Gothic tuz- "un-"), a derivative of the root *deu- (1) "to lack, be wanting" (source of Greek dein "to lack, want").

Very productive in ancient Greek, where it could attach even to proper names (such as dysparis "unhappy Paris"); its entries take up nine columns in Liddell and Scott. Among the words formed from it were some English might covet: dysouristos "fatally favorable, driven by a too-favorable wind;" dysadelphos "unhappy in one's brothers;" dysagres "unlucky in fishing;" dysantiblepos "hard to look in the face."
dysentery (n.): late 14c., dissenterie, from Old French disentere (13c.), from Latin dysenteria, from Greek dysenteria, coined by Hippocrates, from dys- "bad, abnormal, difficult" (see dys-) + entera "intestines, bowels" (see inter-). Related: Dysenteric.
dysfunction (n.): 1916, from dys- "bad, abnormal, difficult" + function (n.).
dysfunctional (adj.): 1917, from dysfunction + -al (1). Related: Dysfunctionally.
dyslexia (n.): c. 1887, from German dyslexie (1883), from Greek dys- "bad, abnormal, difficult" (see dys-) + lexis "word," from legein "speak" (see lecture (n.)) + abstract noun ending -ia. Dyslexic (n.) is first recorded 1961; dyslectic (adj.) from 1964.
dyspepsia (n.): 1706, from Late Latin dyspepsia or a back-formation from dyspeptic (q.v.). Its opposite is eupepsia.
dyspeptic (adj.): 1690s, from Greek dyspeptos "hard to digest," from dys- "bad" (see dys-) + peptos "digested," from peptein "digest" (see cook (n.)).
dysphemism (n.): 1884, "substitution of a vulgar or derogatory word or expression for a dignified or normal one," from Greek dys- "bad, abnormal, difficult" (see dys-) + pheme "speech, voice, utterance, a speaking," from phanai "speak" (see fame (n.); Greek dysphemia meant "ill language, words of ill omen"). The opposite of euphemism. Rediscovered 1933 from French formation dysphémisme (1927, Carnoy).
The French psychologist Albert J. Carnoy gave an extensive definition in his study Le Science du Mot, which in translation runs: "Dysphemism is unpitying, brutal, mocking. It is also a reaction against pedantry, rigidity and pretentiousness, but also against nobility and dignity in language" (1927, xxii, 351). [Geoffrey L. Hughes, "An Encyclopedia of Swearing," 2006]
dysplasia (n.): 1935, Modern Latin, from dys- + -plasia, from Greek plasis "molding, conformation," from plassein (see plasma) + abstract noun ending -ia.
dysprosium (n.): element, obtained 1906 from an earth discovered in 1886, the last to be extracted from the complex earth called yttria, and named dysprosia in reference to the difficulty of obtaining it, from Greek dysprositos "hard to get at, difficult of access," from dys- "bad" (see dys-) + prositos "approachable." With metallic element suffix -ium.