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conducive (adj.)[conducive 词源字典]: 1640s, from conduce + -ive.[conducive etymology, conducive origin, 英语词源]
conduct (v.): early 15c., "to guide," from Latin conductus, past participle of conducere "to lead or bring together" (see conduce). Sense of "convey" is from early 15c.; that of "to direct, manage" is from 1630s; "to behave in a certain way" from c. 1710; "to convey" from 1740. Related: Conducted; conducting. Earlier verb in the same sense was condyten (c. 1400), related to conduit. The noun is from mid-15c., "guide" (in sauf conducte); sense of "behavior" is first recorded 1670s.
conduction (n.): 1530s, "hiring;" 1540s, "leading, guidance," from Old French conduction "hire, renting," from Latin conductionem (nominative conductio), noun of action from past participle stem of conducere (see conduce). Sense of "conducting of a liquid through a channel" is from 1610s; in physics, of heat, etc., from 1814.
conductive (adj.): 1520s, from conduct + -ive. Physics sense is from 1840. Related: Conductivity (1837).
conductor (n.): 1520s, "one who leads or guides," from Middle French conductour (14c., Old French conduitor), from Latin conductor "one who hires, contractor," in Late Latin "a carrier," from conductus, past participle of conducere (see conduce).

Earlier in same sense was conduitour (early 15c., from Old French conduitor). Meaning "leader of an orchestra or chorus" is from 1784; meaning "one who has charge of passengers and collects fares on a railroad" is 1832, American English. Physics sense of "object or device that passes heat" is from 1745; of electricity from 1737.
conduit (n.): c. 1300, conduyt, from Old French conduit (12c.) "escort, protection; pipe, channel," from Latin conductus "a leading, a pipe" (see conduct). A doublet of conduct, differentiated in meaning from 15c.
condyle (n.): 1630s, "knob at the end of a bone," from French condyle (16c.), from Latin condylus, from Greek kondylos "a knuckle," which is of unknown origin.
cone (n.): 1560s, from Middle French cone (16c.) or directly from Latin conus "a cone, peak of a helmet," from Greek konos "cone, spinning top, pine cone," perhaps from PIE root *ko- "to sharpen" (cognates: Sanskrit sanah "whetstone," Latin catus "sharp," Old English han "stone").
Conestoga: 1690s, name of an Indian tribe in southcentral Pennsylvania, probably from some Iroquoian language and sometimes said to mean "people of the cabin pole;" later a place in Lancaster County, Pennsylvania. A characteristic type of covered wagon, called Conestoga wagon, was built there from 1750 (about three years before the last of the Conestoga Indians were massacred), but it already was an established term, as the first reference is to the name of a Philadelphia tavern, and probably originally meant the type of wagon farmers used on the road from the city to Conestoga. Also a breed of horses (1824) and a type of boot and cigar (see stogie).
coney (n.): c. 1200, from Anglo-French conis, plural of conil "long-eared rabbit" (Lepus cunicula) from Latin cuniculus (source of Spanish conejo, Portuguese coelho, Italian coniglio), the small, Spanish variant of the Italian hare (Latin lepus), the word perhaps from Iberian Celtic (classical writers say it is Spanish).

Rabbit arose 14c. to mean the young of the species, but gradually pushed out the older word 19c., after British slang picked up coney as a punning synonym for cunny "cunt" (compare connyfogle "to deceive in order to win a woman's sexual favors"). The word was in the King James Bible [Prov. xxx:26, etc.], however, so it couldn't be entirely dropped, and the solution was to change the pronunciation of the original short vowel (rhyming with honey, money) to rhyme with boney. In the Old Testament, the word translates Hebrew shaphan "rock-badger." Rabbits not being native to northern Europe, there was no Germanic or Celtic word for them.
Coney Island: community in Brooklyn, N.Y., so called for the rabbits once found there (see coney) and was known to the Dutch as Konijn Eiland, from which the English name probably derives. It emerged as a resort and amusement park center after the U.S. Civil War.
confab (n.): 1701, colloquial shortening of confabulation.
confabulate (v.): 1610s, from confabulatus, past participle of Latin confabulari "to converse together," from com- "together" (see com-) + fabulari "to talk, chat," from fabula "a tale" (see fable). Psychiatric sense is from 1924.
confabulation (n.): mid-15c., "talking together," from Late Latin confabulationem (nominative confabulatio), noun of action from past participle stem of Latin confabulari (see confabulate).
confarreation (n.): c. 1600, from Latin confarreationem, from confarreare "to unite in marriage by the Ceremony of the Cake," from com- "with, together" (see com-) + far, farris "spelt, grain, meal" (see barley). In ancient Rome, the most solemn form of marriage, in which an offering of bread was made in the presence of the Pontifex Maximus and 10 witnesses.
confection (n.): mid-14c., confescioun, from Old French confeccion (12c., Modern French confection) "drawing up (of a treaty, etc.); article, product," in pharmacology, "mixture, compound," from Late Latin confectionem (nominative confectio) "a confection," in classical Latin, "a making, preparing," noun of action from confect-, past participle stem of conficere "to prepare," from com- "with" (see com-) + facere "to make, do" (see factitious). Originally "the making by means of ingredients," sense of "candy or light pastry" predominated from 16c.
confectionary (n.): c. 1600, "confection maker," also "confection maker's shop," from confection + -ary. As an adjective, from 1660s.
confectioner (n.): 1590s, agent noun from confection.
confectionery (n.): 1540s, "things made or sold by a confectioner," from confection + -ery. Of architectural ornamentation, from 1861.
confederacy (n.): late 14c., from Anglo-French confederacie (Old French confederacie), from stem of Latin confoederatio, from confoederare (see confederate). Earliest in reference to leagues of classical Greek states (Aetolian, Achaean, etc.), later of the Netherlands. The word was used of the United States of America under (and in) the Articles of Confederation (1777-1788). In reference to the breakaway Confederate States of America (1861-1865) from 1861.
Confederacy now usually implies a looser or more temporary association than confederation, which is applied to a union of states organized on an intentionally permanent basis. [OED]