Online Etymology Dictionary

quirky (adj.): 1806, "shifty," from quirk + -y (2). Sense of "idiosyncratic" first recorded 1960. Related: Quirkiness.
quirt (n.): 1845, from Mexican Spanish cuarta.
quisling (n.): 1940, from Vidkun Quisling (1887-1945), Norwegian fascist politician who headed the puppet government during the German occupation of Norway in World War II; shot for treason after German defeat. First used in London Times of April 15, 1940, in a Swedish context.
quit (v.): c.1200, "to repay, discharge" (a debt. etc.), from Old French quiter, from quite (see quit (adj.)). Meaning "to reward, give reward" is mid-13c., that of "take revenge; to answer, retort" and "to acquit oneself" are late 14c. From c.1300 as "to acquit (of a charge), declare not guilty." Sense of "leave, depart" is attested from c.1400; that of "stop" (doing something) is from 1640s. Meaning "to give up, relinquish" is from mid-15c. Related: Quitted; quitting. Quitting time is from 1835.
quit (adj.): early 13c., "free, clear," from Old French quite "free, clear," from Latin quietus "free" (in Medieval Latin "free from war, debts, etc."), also "calm, resting" (see quiet).
quite (adv.): early 14c., adverbial form of Middle English quit, quite (adj.) "free, clear" (see quit (v.)). Originally "thoroughly;" the weaker sense of "fairly" is attested from mid-19c.
quits (adj.): "even" (with another), 1660s; see quit (adj.).
quitter (n.): as an insult, 1881, American English, agent noun from quit (v.).
quiver (v.): "to tremble," late 15c., perhaps imitative, or possibly an alteration of quaveren (see quaver), or from Old English cwifer-, perhaps related to cwic "alive" (see quick). Related: Quivered; quivering.
quiver (n.): "case for holding arrows," early 14c., from Anglo-French quiveir, Old French quivre, probably from Proto-Germanic *kukur "container" (cf. Old High German kohhari, Old Frisian koker, Old English cocur "quiver"); said to be from the language of the Huns.
quixotic (adj.): "extravagantly chivalrous," 1791, from Don Quixote, romantic, impractical hero of Cervantes' satirical novel "Don Quixote de la Mancha" (1605). His name literally means "thigh," also "a cuisse" (a piece of armor for the thigh), in Modern Spanish quijote, from Latin coxa "hip."
quiz: 1847, quies, perhaps from Latin qui es? "who are you?," first question in oral exams in Latin in old-time grammar schools. Spelling quiz first recorded 1886, though it was in use as a noun from 1867, perhaps from apparently unrelated slang word quiz meaning "odd person" (1782, source of quizzical). The anecdote that credits this word to a bet by the Dublin theater-manager Daly that he could coin a word is regarded by authorities as "doubtful" and the first record of it appears to be in 1836 (in Smart's "Walker Remodelled"; the story is omitted in the edition of 1840).
quizzical: 1789, from quiz "odd or eccentric person" (1782), of unknown origin (see quiz).
quo warranto: Medieval Latin, literally "by what warrant," from quo "from, with, or by whom or what?," ablative of interrogative pronoun quis "who?" (see who).
quod: "prison," c.1700, a cant slang word of unknown origin.
quodlibet (n.): "a nicety, subtlety," late 14c., Latin, literally "what you will," from quod "what," neuter of qui (see who) + libet "it pleases" (see love).
quoin (n.): 1530s, "a cornerstone," variant of coin (n.), originally in other senses of that word, too, including "a wedge."
quoit (n.): late 14c., "curling stone," perhaps from Old French coite "flat stone" (with which the game was originally played), literally "cushion," variant of coilte (see quilt). Quoits were among the games prohibited by Edward III and Richard II to encourage archery. In reference to a heavy flat iron ring (and the tossing game played with it) it is recorded from mid-15c.
quondam: 1530s, Latin, literally "formerly," used in English as a noun meaning "former holder of some office or position."
Quonset hut: 1942, from Quonset Point Naval Air Station, Rhode Island, where this type of structure was first built, 1941. The place name is from a southern New England Algonquian language and perhaps means "small, long place."
quorate (n.): 1969, from quorum + -ate (1).
quorum (n.): early 15c., in reference to certain eminent justices of the peace, from Latin quorum "of whom," genitive plural (masc. and neuter; fem. quarum) of qui "who" (see who). The traditional wording of the commission appointing justices of the peace translates as, "We have also assigned you, and every two or more of you (of whom [quoram vos] any one of you the aforesaid A, B, C, D, etc. we will shall be one) our justices to inquire the truth more fully." The justices so-named were usually called the justices of the quorum. Meaning "fixed number of members whose presence is necessary to transact business" is first recorded 1610s.
quota (n.): 1660s, from Medieval Latin quota, from Latin quota pars "how large a part," from quota, fem. singular of quotus "which, what number (in sequence)." See quote. Earliest reference is to contributions of soldiers or supplies levied from a town or district; immigration sense is from 1921.
quotable (adj.): 1821, from quote (v.) + -able. Related: Quotably.
quotation (n.): mid-15c., "numbering," later (1530s) "marginal notation," from Medieval Latin quotationem (nominative quotatio), from quotare "to number" (see quote). Meaning "passage quoted" is from 1680s. Quotation marks attested by 1777.
quote (v.): late 14c., "to mark (a book) with chapter numbers or marginal references," from Old French coter, from Medieval Latin quotare "distinguish by numbers, number chapters," from Latin quotus "which, what number (in sequence)," from quot "how many," related to quis "who" (see who).

The sense development is via "to give as a reference, to cite as an authority" to "to copy out exact words" (1670s). The business sense of "to state the price of a commodity" (1866) revives the etymological meaning. Related: Quoted; quoting.
quote (n.): "quotation," 1885, from quote (v.).
quoth (v.): Old English cwæð, past tense of cweðan "to say, speak, name, call" (cf. Old Saxon quethan, Old Norse kveða, Old Frisian quetha, Old High German quedan, Gothic qiþan). Cf. archaic quotha "said he" (1510s) for Old English cwæðe ge "think you?"
quotidian (adj.): mid-14c., "everyday, daily," from Latin quotidianus "daily," from Latin quotus "how many, which in order or number" + dies "day" (see diurnal).
quotient (n.): early 15c., from Latin quotiens "how often? how many times?; as often as," pronomial adverb of time, related to quando? "when?" qui "who" (see who). The Latin adverb quotiens was mistaken in Middle English for a present participle in -ens.
Quran (n.): 1876, variant spelling (preferred by scholars) of Koran (q.v.), from Arabic qur'an, literally "book, reading, recitation," from qara'a "to read." Related: Quranic.
qwerty: 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; 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.