masteryoudaoicibaDictYouDict[master 词源字典]
master: [OE] The Latin word for ‘master, chief’ was magister (which is generally assumed to have been based on the root of Latin magis ‘more’ and magnus ‘big’, source of English magnify, magnitude, etc). Its more obvious English descendants include magistrate and magisterial, and indeed English originally acquired magister itself in the 10th century in the form mægister, but over the years (partly under the influence of Old French maistre) this developed to master.

The feminine counterpart mistress [14] was borrowed from Old French maistresse, a form maintained in English for some time. The alteration of mais- to mis- began in the 15th century, due probably to the weakly-stressed use of the word as a title (a phenomenon also responsible for the emergence of mister [16] from master). The abbreviated miss followed in the 17th century.

=> magistrate, magnitude, magnum, miss, mister, mistress[master etymology, master origin, 英语词源]
bob (n.2)youdaoicibaDictYouDict
"short hair," 1680s, attested 1570s in sense of "a horse's tail cut short," from earlier bobbe "cluster" (as of leaves), mid-14c., a northern word, perhaps of Celtic origin (compare Irish baban "tassel, cluster," Gaelic babag). Used over the years in various senses connected by the notion of "round, hanging mass," such as "weight at the end of a line" (1650s). The hair sense was revived with a shift in women's styles early 20c. (verb 1918, noun 1920). Related words include bobby pin, bobby sox, bobsled, bobcat.
corporatism (n.)youdaoicibaDictYouDict
1890, from corporate + -ism. Used over the years in various senses of corporate, in 1920s-30s often with reference to fascist collectivism.
cotton-picking (adj.)youdaoicibaDictYouDict
as a deprecatory term first recorded in a Bugs Bunny cartoon, but a similar noun meaning "contemptible person" dates to around 1919, perhaps with racist overtones that have faded over the years. Before mechanization, cotton picking was the most difficult labor on a cotton plantation.
I drove out to a number of the farms near Denison and found many very young white children working all day in the hot sun picking and dragging sacks of cotton. In one field the labor corps consisted of one woman and six children, one of them 5 years, one 6 years, one 7 years, one 9 years, and two about 11. The father was plowing. The 5 and 6 year olds worked all day as did the rest. The 7-year-old said he picked 50 pounds a day and the 9 year old 75 pounds. (A good picker averages several hundred a day.) School begins late on account of the cotton picking, but the children nearly all prefer school to the picking. Picking hours are long, hot, and deadly monotonous. While the very young children seem to enjoy it, very soon their distaste for it grows into all-absorbing hatred for all work. ["Field Notes of Lewis W. Hine, Child-Labor Conditions in Texas," report to U.S. Congressional Commission on Industrial Relations, 1916]
ducat (n.)youdaoicibaDictYouDict
late 14c., from Old French ducat (late 14c.), from Italian ducato (12c.), from Medieval Latin ducatus "coin," originally "duchy," from dux (genitive ducis) "duke" (see duke (n.)).

So called for the name or effigy of Roger II of Sicily, Duke of Apulia, which first issued the coins (c.1140). Byzantine emperor Constantine X had the Greek form doux struck on his coins during his reign (1059-1067). Over the years it was a unit of currency of varying value in Holland, Russia, Austria, Sweden, Venice, etc. Remained popular in slang for "money" or "ticket" from its prominence in "The Merchant of Venice."
extenuate (v.)youdaoicibaDictYouDict
1520s, from Latin extenuatus, past participle of extenuare "lessen, make small, reduce, diminish, detract from," from ex- "out" (see ex-) + tenuare "make thin," from tenuis "thin" (see tenet). Used over the years in a variety of literal and figurative senses in English. Related: Extenuated; extenuating. Extenuating circumstances (1660s) are those which lessen the magnitude of guilt (opposed to aggravating).
formalism (n.)youdaoicibaDictYouDict
1840, "strict adherence to prescribed forms," from formal + -ism. Used over the years in philosophy, theology, literature, and art in various senses suggesting detachment of form from content, or spirituality, or meaning; or belief in the sufficiency of formal logic. Related: Formalist.
franc (n.)youdaoicibaDictYouDict
French coin, late 14c., frank, from French franc; a name said to have been given because Medieval Latin Francorum Rex, "King of the Franks" (see Frank), was inscribed on gold coins first made during the reign of Jean le Bon (1350-64). Used of different gold and silver coins over the years; as the name of an official monetary unit of France from 1795.
frigate (n.)youdaoicibaDictYouDict
1580s, from Middle French frégate (1520s), from Italian fregata (Neapolitan fregate), which with many names for types of sea vessels is of unknown origin. It is common to the Mediterranean languages (Spanish, Portuguese, Catalan fragata). Originally a small, swift vessel; the word was applied to progressively larger types over the years.
[A] light nimble vessel built for speed; employed in particular for the gleaning of intelligence and the protection and assault of trade-routes. In battle the frigates took station on the disengaged side of the fleet, where they repeated signals, sped on messages, and succoured the distressed. [Sir Geoffrey Callender, "Sea Passages," 1943]
In the old sailing navy usually they carried guns on a raised quarter-deck and forecastle, hence frigate-built (1650s) of a vessel having the quarter-deck and forecastle raised above the main-deck.
muslin (n.)youdaoicibaDictYouDict
c. 1600, "delicately woven cotton fabric," from French mousseline (17c.), from Italian mussolina, from Mussolo, Italian name of Mosul, city in northern Mesopotamia (modern Iraq) where muslin was made. Like many fabric names, it has changed meaning over the years, in this case from luxurious to commonplace. In 13c. French, mosulin meant "cloth of silk and gold." The meaning "everyday cotton fabric for shirts, bedding, etc." is first attested 1872 in American English.
noli me tangereyoudaoicibaDictYouDict
late 14c., "type of facial ulcer, lupus," Latin, literally "touch me not," from noli, imperative of nolle "to be unwilling" + me (see me) + tangere "to touch" (see tangent (adj.)). Used over the years of various persons or things that must not be touched, especially "picture of Jesus as he appeared to Mary Magdalene" (1670s, see John 20:17) and "plant of the genus Impatiens" (1560s, so called because the ripe seed pods burst when touched).
out (v.)youdaoicibaDictYouDict
Old English utian "expel, put out" (see out (adv.)); used in many senses over the years. Meaning "to expose as a closet homosexual" is first recorded 1990 (as an adjective meaning "openly avowing one's homosexuality" it dates from 1970s; see closet); sense of "disclose to public view, reveal, make known" has been present since mid-14c.
Eufrosyne preyde Þat god schulde not outen hire to nowiht. [Legendary of St. Euphrosyne, c. 1350]
Related: Outed; outing.
squaw (n.)youdaoicibaDictYouDict
"American Indian woman," 1630s, from Massachuset (Algonquian) squa "woman" (cognate with Narraganset squaws "woman"). "Over the years it has come to have a derogatory sense and is now considered offensive by many Native Americans" [Bright]. Widespread in U.S. place names, sometimes as a translation of a local native word for "woman."
tar (v.)youdaoicibaDictYouDict
late Old English, "to smear with tar," from tar (n.1). To tar and feather (1769) was famously a mob action in America in Revolutionary times (used by both sides) and several decades thereafter. The punishment itself first is found in an ordinance of Richard I (1189) as the penalty in the Crusader navy for theft. Among other applications over the years was its use in 1623 by a bishop on "a party of incontinent friars and nuns" [OED], but the verbal phrase is not attested until 18c. Related: Tarred; tarring.
theosophy (n.)youdaoicibaDictYouDict
1640s (implied in theosophical), "knowledge of divine things obtained through mystic study," from Medieval Latin theosophia (c.880), from Late Greek theosophia (c.500) "wisdom concerning God or things divine," from Greek theosophos "one wise about God," from theos "god" (see theo-) + sophia "skill, knowledge of, acquaintance with; philosophy," from sophos "wise, learned" (see sophist).

Applied variously over the years, including to the followers of Swedenborg. Taken as the name of a modern philosophical system (sometimes called Esoteric Buddhism), founded in New York 1875 as "Theosophical Society" by Madame Blavatsky and others, which has elements of Hinduism and Buddhism and claims supernatural knowledge of the divinity and his words deeper than that obtained from empiricism. Related: Theosophist.