quarteryoudaoicibaDictYouDict[quarter 词源字典]
quarter: [13] Quarter is one of a large family of English words that go back ultimately to Latin quattuor ‘four’ and its relatives. Direct descendants of quattuor itself are actually fairly few – among them quatrain [16] and quatrefoil [15] (both via Old French). But its ordinal form quārtus ‘fourth’ has been most prolific: English is indebted to it for quart [14], quarter (via the Latin derivative quartārius ‘fourth part’), quartet [18], and quarto [16].

In compounds quattuor assumed the form quadr-, which has given English quadrangle [15] (and its abbreviation quad [19]), quadrant [14], quadratic [17], quadrille [18], quadruped [17], quadruplet [18] (also abbreviated to quad [19]), quarantine, quarrel ‘arrow’, not to mention the more heavily disguised cadre [19], carfax [14] (which means etymologically ‘four-forked’), squad, and square.

And the derivative quater ‘four times’ has contributed carillon [18] (etymologically a peal of ‘four’ bells), quaternary [15], and quire of paper [15] (etymologically a set of ‘four’ sheets of paper).

=> cadre, carfax, carillon, quad, quarrel, quarry, quire, squad, square[quarter etymology, quarter origin, 英语词源]
close quartersyoudaoicibaDictYouDict
1753, originally nautical, also close-fights, "bulkheads fore and aft for men to stand behind in close engagements to fire on the enemy," it reflects the confusion of close (v.) and close (adj.); "now understood of proximity, but orig. 'closed' space on ship-board where last stand could be made against boarders" [Weekley]. Compare also closed-minded, a variant of close-minded attested from 1880s, with a sense of "shut" rather than "tight."
headquarters (n.)youdaoicibaDictYouDict
"residence of a military commander," 1640s, from head (adj.) + quarters. Headquarter as a verb is recorded from 1838 (in Headquartered).
quarter (n.)youdaoicibaDictYouDict
c. 1300, "one-fourth of anything; one of four parts or divisions of a thing;" often in reference to the four parts into which a slaughtered animal is cut, from Old French quartier, cartier (12c.), from Latin quartarius "fourth part," from quartus "fourth" (see quart). One of the earliest dated references in English is to "parts of the body as dismembered during execution" (c. 1300).

Used of the phases of the moon from early 15c. The use of quarter of an hour is attested from mid-15c. In Middle English quarter also meant "one of the four divisions of a 12-hour night" (late 14c.), and the quarter of the night meant "nine o'clock p.m." (early 14c.).

From late 14c. as "one of the four quadrants of the heavens;" hence, from the notion of the winds, "a side, a direction" (c. 1400). In heraldry from mid-14c. as "one of the four divisions of a shield or coat of arms." The word's connection with "four" loosened in Middle English and by 15c. expressions such as six-quartered for "six-sided" are found. Meaning "region, locality, area, place" is from c. 1400. Meaning "portion of a town" (identified by the class or race of people who live there) is first attested 1520s. For military sense, see quarters. As a period of time in a football game, from 1911. Quarter horse, bred strong for racing on quarter-mile tracks, first recorded 1834.

The coin (one fourth of a dollar) is peculiar to U.S., first recorded 1783. But quarter could mean "a farthing" in Middle English (late 14c.), and compare British quadrant "a farthing" (c. 1600), and classical Latin quadrans, the name of a coin worth a quarter of an as (the basic unit of Roman currency).

Quarter days (mid-15c.), designated as days when rents were paid and contracts and leases began or expired, were, in England, Lady day (March 25), Midsummer day (June 24), Michaelmas day (Sept. 29), and Christmas day (Dec. 25); in Scotland, keeping closer to the pagan Celtic calendar, they were Candlemas (Feb. 2), Whitsunday (May 15), Lammas (Aug. 1), and Martinmas (Nov. 11). Quarter in the sense "period of three months; one of the four divisions of a year" is recorded from late 14c.
quarter (v.)youdaoicibaDictYouDict
"to cut in quarters, divide into four parts," mid-14c., from quarter (n.). Specifically as the word for a form of criminal punishment from late 14c. (Old English had slitcwealm "death by rending"). Related: Quartered; quartering. The meaning "to put up soldiers" is recorded from 1590s (see quarters).
quarterback (n.)youdaoicibaDictYouDict
in U.S. football, 1876, from quarter (n.) + back (n.); so called from his position on the field at the start of play, between the halfback and the center. As a verb from 1945. Figurative sense from 1952. Monday morning quarterback is 1932 (n.), 1972 (v.); originally pro football player slang for sportswriters (U.S. professional football games typically are played on Sundays).
quarterly (adv.)youdaoicibaDictYouDict
early 15c., from quarter (n.) + -ly (2). As an adjective from 1560s, from -ly (1). As a noun, from 1830, "a quarterly publication," from the adjective.
quartermaster (n.)youdaoicibaDictYouDict
early 15c., "subordinate officer of a ship," from French quartier-maître or directly from Dutch kwartier-meester; originally a ship's officer whose duties included stowing of the hold; later (c. 1600) an officer in charge of quarters and rations for troops. See quarters.
quarters (n.)youdaoicibaDictYouDict
"military dwelling place," 1590s, from quarter (n.) in sense of "portion of a town." As "part of an American plantation where the slaves live," from 1724. The military sense seems to be also the source of quartermaster and it might be behind the phrase give quarter "spare from immediate death" (1610s, often in the negative), on the notion of "provide a prisoner with shelter."
quarterstaff (n.)youdaoicibaDictYouDict
also quarter-staff, 1540s (quarter-stroke "stroke with a quarterstaff" is attested from early 15c.), stout pole, six to eight feet long (six-and-a-half sometimes is given as the standard length), tipped with iron, formerly a weapon used by the English peasantry. From staff (n.); the quarter is of uncertain signification. According to one theory, favored by fencing manuals, etc., it likely is in reference to operation of the weapon:
It was grasped by one hand in the middle, and by the other between the middle and the end. In the attack the latter hand shifted from one quarter of the staff to the other, giving the weapon a rapid circular motion, which brought the ends on the adversary at unexpected points. [Century Dictionary]
Linguists tend to prefer an explanation from woodcutting, perhaps a reference to a cut of lumber known as a quarter, but contemporary evidence is wanting for either conjecture.
quartet (n.)youdaoicibaDictYouDict
1773, "musical composition for four instruments or voices," from French quartette, from Italian quartetto, diminutive of quarto "fourth," from Latin quartus "fourth" (see quart). Meaning "set of four singers or musical performers" is from 1814.