爱词海
jamyoudaoicibaDictYouDict[jam 词源字典]
jam: [18] The verb jam, meaning ‘press tightly together’, first appears in the early 18th century (the earliest-known unequivocal example of its transitive use is in Daniel Defoe’s Robinson Crusoe 1719: ‘The ship stuck fast, jaum’d in between two rocks’). It is not known where it came from, but it is generally assumed to be imitative or symbolic in some way of the effort of pushing.

Equally mysterious are the origins of jam the sweet substance spread on bread, which appeared around the same time. Contemporary etymologists were nonplussed (Nathan Bailey had a stab in the 1730s: ‘prob. of J’aime, i.e. I love it; as Children used to say in French formerly, when they liked any Thing’; but Dr Johnson in 1755 confessed ‘I know not whence derived’); and even today the best guess that can be made is that the word refers to the ‘jamming’ or crushing of fruit into jars.

[jam etymology, jam origin, 英语词源]
jam (v.)youdaoicibaDictYouDict
"to press tightly," also "to become wedged," 1706, of unknown origin, perhaps a variant of champ (v.). Of a malfunction in the moving parts of machinery, by 1851. Sense of "cause interference in radio signals" is from 1914. Related: Jammed; jamming. The adverb is recorded from 1825, from the verb.
qwertyyoudaoicibaDictYouDict
1929, from the first six keys on a standard typewriter keyboard, read as though text, from top left. Mechanical typewriter patented 1867; the QWERTY layout itself is said to date to 1887, dominant in U.S. from early 20c.; it is not meant to slow down typists, but to separate the letters in common digraphs (-sh-, -ck-, etc.) to reduce jamming of swing-arms in old-style machines. It actually speeds typing by requiring alternate-hand strokes, which is one reason the alternative DVORAK keyboard is not appreciably faster. Remnants of the original alphabetic typewriter keyboard remain in the second row of letter keys: FGH-JKL. The French standard was AZERTY; in Germany, QWERTZ; in Italy, QZERTY.
jams (n.)youdaoicibaDictYouDict[jams 词源字典]
1966, abstracted from pajamas (q.v.).[jams etymology, jams origin, 英语词源]
JanuaryyoudaoicibaDictYouDict[January 词源字典]
January: [14] The ancient Romans had a god named Janus whose head had two faces, looking in opposite directions. He was the tutelary deity of doorways, and his festival month was at the beginning of the year, when he could look both backwards at the old year and forwards to the new one. This month was therefore called Jānuārius mensis ‘month of Janus’ – whence English January.
[January etymology, January origin, 英语词源]
panjandrumyoudaoicibaDictYouDict
panjandrum: [18] Panjandrum is an invented word, coined in 1755 by the English actor and playwright Samuel Foote (1720–77) to test the memory of the actor Charles Macklin, who claimed to be able to memorize and repeat anything said to him (it was one of several inventions in the same vein that Foote put to him: ‘And there were present the Picninnies, and the Joblillies, and the Garyulies, and the Grand Panjandrum himself, with the little round button at top’). It does not seem to have been taken up as a general comical term for a ‘pompous highranking person’ until the 19th century.
AzerbaijanyoudaoicibaDictYouDict
country name, of unknown origin, perhaps from Old Persian Aturpatakan, from Greek Atropatene, from the Persian satrap Atropates, who ruled there in the time of Alexander the Great; or from local azer "fire" + baydjan (Iranian baykan) "guardian," in reference to fire-worship.
JaneyoudaoicibaDictYouDict
fem. proper name, from French Jeanne, Old French Jehane, from Medieval Latin Johanna (see John). As a generic name for "girl, girlfriend" it is attested from 1906 in U.S. slang. Never a top-10 list name for girls born in the U.S., it ranked in the top 50 from 1931 to 1956. It may owe its "everywoman" reputation rather to its association with John.
JanetyoudaoicibaDictYouDict
fem. proper name, a diminutive of Jane with -et. In Middle English, Ionete-of-the-steues was a common name for a prostitute (late 14c.).
jangle (n.)youdaoicibaDictYouDict
late 13c., "gossip, slanderous conversation, dispute," from Old French jangle, from jangler (see jangle (v.)). Meaning "discordant sound" is from 1795.
jangle (v.)youdaoicibaDictYouDict
c. 1300, jangeln, "to talk excessively, chatter, talk idly," from Old French jangler "to chatter, gossip, bawl, argue noisily" (12c.), perhaps from Frankish *jangelon "to jeer" or some other Germanic source (compare Middle Dutch jangelen "to whine"). Meaning "make harsh noise" is first recorded late 15c. Related: Jangled; jangling.
janitor (n.)youdaoicibaDictYouDict
1580s, "an usher in a school," later "doorkeeper" (1620s), from Latin ianitor "doorkeeper, porter," from ianua "door, entrance, gate," from ianus "arched passageway, arcade" (see Janus) + agent suffix -tor. Meaning "caretaker of a building" first recorded 1708.
janitorial (adj.)youdaoicibaDictYouDict
1869, from janitor + -ial.
janizary (n.)youdaoicibaDictYouDict
"elite Turkish infantry," 1520s, from French janissaire (15c.), from Italian giannizzero, from Turkish yenicheri, literally "new troops," from yeni "new" + cheri "soldiery." Formed 1362 from slaves and prisoners of war, until late 17c. largely recruited from compulsory conscripts and converts taken from Christian subjects. In later times Turks and other Muslims joined the corps because of the various privileges attached to it; abolished 1826.
JankinyoudaoicibaDictYouDict
masc. proper name, from Jan, variant of John, + diminutive suffix -kin. In Middle English, applied contemptuously to priests.
Jansenism (n.)youdaoicibaDictYouDict
1650s, in reference to doctrine of Cornelius Jansen (1585-1638), Catholic bishop of Ypres, who maintained the perverseness and inability for good of the natural human will. Related: Jansenist.
January (n.)youdaoicibaDictYouDict
late 13c., Ieneuer, from Old North French Genever, Old French Jenvier (Modern French Janvier), attested from early 12c. in Anglo-French, from Latin Ianuarius (mensis) "(the month) of Janus," to whom the month was sacred as the beginning of the year (see Janus; cognates: Italian Gennaio, Provençal Genovier, Portuguese Janeiro). The form was gradually Latinized by c. 1400. Replaced Old English geola se æfterra "Later Yule." In Chaucer, a type-name for an old man.
JanusyoudaoicibaDictYouDict
ancient Italic deity, guardian god of portals, doors, and gates; patron of beginnings and endings, c. 1500, from Latin Ianus, literally "gate, arched passageway," perhaps from PIE root *ei- (1) "to go" (cognates: Sanskrit yanah "path," Old Church Slavonic jado "to travel"). He is shown as having two faces, one in front the other in back. His temple in Rome was closed only in times of peace.
panjandrum (n.)youdaoicibaDictYouDict
mock name for a pompous personage, 1755, invented by Samuel Foote (1720-1777) in a long passage full of nonsense written to test the memory of actor Charles Macklin (1697-1797), who said he could repeat anything after hearing it once.
plain JaneyoudaoicibaDictYouDict
"unattractive woman," first attested 1912.
Rio de JaneiroyoudaoicibaDictYouDict
literally "January River," named by explorer Amerigo Vespucci because he discovered it on Jan. 1, 1502, and so called because he incorrectly thought the bay was the estuary of a large river. See January.
TejanoyoudaoicibaDictYouDict
"native or inhabitant of Texas," 1925, from American Spanish, formerly Texano "a Texan" (see Texas).
Trojan (adj.)youdaoicibaDictYouDict
Old English Troian "of or pertaining to ancient Troy," from Latin Trojanus, from Troia, Troja "Troy," from the Greek name for the city, said to be from Tros, name of a king of Phrygia, the mythical founder of Troy. Trojan horse was figurative of ambush-from-within in Roman times (equus Troianus); attested in English from 1570s; the computer virus sense is attested by 1982.

As a noun from mid-14c., "inhabitant of ancient Troy;" in early modern English, the noun could mean "a determined fellow, one who fights or works hard," from the Trojans' long resistance to the Greeks in the Trojan War, but also in 17c., it was a colloquial term for "person of dissolute life, carousing companion." The trade name for a brand of prophylactic contraceptive was registered 1927 in U.S.
Jane DoeyoudaoicibaDictYouDict
"An anonymous female party, typically the plaintiff, in a legal action", Mid 19th century: the female equivalent of John Doe.
JaneyoudaoicibaDictYouDict[Jane 词源字典]
fem. proper name, from French Jeanne, Old French Jehane, from Medieval Latin Johanna (see John). As a generic name for "girl, girlfriend" it is attested from 1906 in U.S. slang. Never a top-10 list name for girls born in the U.S., it ranked in the top 50 from 1931 to 1956. It may owe its "everywoman" reputation rather to its association with John.[Jane etymology, Jane origin, 英语词源]
JanetyoudaoicibaDictYouDict[Janet 词源字典]
fem. proper name, a diminutive of Jane with -et. In Middle English, Ionete-of-the-steues was a common name for a prostitute (late 14c.).[Janet etymology, Janet origin, 英语词源]
jangle (n.)youdaoicibaDictYouDict[jangle 词源字典]
late 13c., "gossip, slanderous conversation, dispute," from Old French jangle, from jangler (see jangle (v.)). Meaning "discordant sound" is from 1795.[jangle etymology, jangle origin, 英语词源]
jangle (v.)youdaoicibaDictYouDict
c. 1300, jangeln, "to talk excessively, chatter, talk idly," from Old French jangler "to chatter, gossip, bawl, argue noisily" (12c.), perhaps from Frankish *jangelon "to jeer" or some other Germanic source (compare Middle Dutch jangelen "to whine"). Meaning "make harsh noise" is first recorded late 15c. Related: Jangled; jangling.
jangle (n.)youdaoicibaDictYouDict[jangle 词源字典]
late 13c., "gossip, slanderous conversation, dispute," from Old French jangle, from jangler (see jangle (v.)). Meaning "discordant sound" is from 1795.[jangle etymology, jangle origin, 英语词源]
jangle (v.)youdaoicibaDictYouDict
c. 1300, jangeln, "to talk excessively, chatter, talk idly," from Old French jangler "to chatter, gossip, bawl, argue noisily" (12c.), perhaps from Frankish *jangelon "to jeer" or some other Germanic source (compare Middle Dutch jangelen "to whine"). Meaning "make harsh noise" is first recorded late 15c. Related: Jangled; jangling.
janitor (n.)youdaoicibaDictYouDict[janitor 词源字典]
1580s, "an usher in a school," later "doorkeeper" (1620s), from Latin ianitor "doorkeeper, porter," from ianua "door, entrance, gate," from ianus "arched passageway, arcade" (see Janus) + agent suffix -tor. Meaning "caretaker of a building" first recorded 1708.[janitor etymology, janitor origin, 英语词源]
janizary (n.)youdaoicibaDictYouDict[janizary 词源字典]
"elite Turkish infantry," 1520s, from French janissaire (15c.), from Italian giannizzero, from Turkish yenicheri, literally "new troops," from yeni "new" + cheri "soldiery." Formed 1362 from slaves and prisoners of war, until late 17c. largely recruited from compulsory conscripts and converts taken from Christian subjects. In later times Turks and other Muslims joined the corps because of the various privileges attached to it; abolished 1826.[janizary etymology, janizary origin, 英语词源]
JankinyoudaoicibaDictYouDict[Jankin 词源字典]
masc. proper name, from Jan, variant of John, + diminutive suffix -kin. In Middle English, applied contemptuously to priests.[Jankin etymology, Jankin origin, 英语词源]