quinque- Look up quinque- at Dictionary.com
before vowels quinqu-, word-forming element meaning "five, having five," from Latin quinque "five," by assimilation from PIE root *penkwe- "five."
quinquennial (adj.) Look up quinquennial at Dictionary.com
late 15c., "lasting five years," from Latin quinquennis "of five years, celebrated every fifth year," from quinque- "five" (from PIE root *penkwe- "five") + ending from biennial, etc. Meaning "happening once every five years" attested from c. 1600. As a noun from 1895; earlier quinquennal (1610s).
quinsy (n.) Look up quinsy at Dictionary.com
"severe sore throat," late 14c., qwinaci, from Old French quinancie (Modern French esquinacie), from Late Latin cynanche, from Greek kynankhe "sore throat," also "dog collar," literally "dog-choking," from kyon (genitive kynos) "dog" (from PIE root *kwon- "dog") + ankhein "to strangle," from PIE root *angh- "tight, painfully constricted, painful."
quint (n.) Look up quint at Dictionary.com
1520s, "a tax of one-fifth," from Middle French quint, from Latin quintus "the fifth," ordinal to quinque "five" (from PIE root *penkwe- "five"). Used in English of various groups of five since 17c. First attested 1935 as a shortening of quintuplet (American English; British English prefers quin); used originally of the Dionne quintuplets, born May 28, 1934, near Callander, Ontario, Canada.
quinta (n.) Look up quinta at Dictionary.com
"country house, villa," 1754, from Spanish and Portuguese quinta, originally a farm and house let out for a rent of one-fifth of its produce, from Latin quintus "one fifth," related to quinque "five" (see quinque-).
quintain (n.) Look up quintain at Dictionary.com
"target for tilting and jousting practice," c. 1400 (in Anglo-Latin from mid-13c.), from Old French quintaine or directly from Medieval Latin quintana; perhaps from Latin quintana "of the fifth" (from PIE root *penkwe- "five"), which as a noun meant "the business part of a camp," on the supposition that this was where military exercises were done [OED].
quintal (n.) Look up quintal at Dictionary.com
"a weight of a hundred pounds," c. 1400, from Old French quintal "hundredweight," and directly from Medieval Latin quintale, from Arabic quintar, from Late Greek kentenarion, from Latin centenarius "containing a hundred" (see centenary).
quintessence (n.) Look up quintessence at Dictionary.com
early 15c., in ancient and medieval philosophy, "pure essence, substance of which the heavenly bodies are composed," literally "fifth essence," from Middle French quinte essence (14c.), from Medieval Latin quinta essentia, from Latin quinta, fem. of quintus "fifth" (from PIE root *penkwe- "five") + essentia "being, essence," abstract noun formed (to translate Greek ousia "being, essence") from essent-, present participle stem of esse "to be," from PIE root *es- "to be."

A loan-translation of Greek pempte ousia, the "ether" added by Aristotle to the four known elements (water, earth, fire, air) and said to permeate all things. Its extraction was one of the chief goals of alchemy. Sense of "purest essence" (of a situation, character, etc.) is first recorded 1580s.
quintessential (adj.) Look up quintessential at Dictionary.com
c. 1600, "purest, most refined," from quintessence (Medieval Latin quint essentia) + -al (1). Related: Quintessentially.
quintet (n.) Look up quintet at Dictionary.com
1811, "composition for five voices," from Italian quintetto, diminutive of quinto "fifth," from Latin quintus "the fifth," related to quinque "five" (from PIE root *penkwe- "five"). Meaning "set of five singers or players" is from 1882.
quintile (n.) Look up quintile at Dictionary.com
1610s, originally in astrology, from Latin quintus "the fifth" (from PIE root *penkwe- "five") + -ile, from quartile. Use in statistics dates to 1951.
quintillion (n.) Look up quintillion at Dictionary.com
1670s, from Latin quintus "the fifth" (from PIE root *penkwe- "five") + ending from million. Compare billion. In Great Britain, the fifth power of a million (1 followed by 30 zeroes); in U.S. the sixth power of a thousand (1 followed by 18 zeroes).
quintuple (v.) Look up quintuple at Dictionary.com
1630s, from quintuple (adj.) or from French quintupler (v.). Related: Quintupled; quintupling.
quintuple (adj.) Look up quintuple at Dictionary.com
1560s, from French quintuple (15c.), from Late Latin quintuplex, from Latin quintus "fifth" (related to quinque "five;" from PIE root *penkwe- "five") on model of quadruple. Related: Quintuplicate.
quintuplet (n.) Look up quintuplet at Dictionary.com
1873, "set of five things" (originally in music), from quintuple (adj.) with ending from triplet. In plural, "five children at one birth" it is recorded from 1889.
quinzane (n.) Look up quinzane at Dictionary.com
"group of fifteen," 1856, from French quinzaine (12c.), from quinze "fifteen," from Latin quindecim (see fifteen).
quip (v.) Look up quip at Dictionary.com
"make a quip," 1570s, from quip (n.). Related: Quipped; quipping.
quip (n.) Look up quip at Dictionary.com
1530s, variant of quippy in same sense (1510s), perhaps from Latin quippe "indeed, of course, as you see, naturally, obviously" (used sarcastically), from quid "what" (neuter of pronoun quis "who," from PIE root *kwo-, stem of relative and interrogative pronouns), and compare quibble (n.)) + emphatic particle -pe.
quipu (n.) Look up quipu at Dictionary.com
ancient Inca recording device using knotted cords, 1704, from Quechua quipu "knot."
quire (n.2) Look up quire at Dictionary.com
early form and later variant spelling of choir (q.v.).
quire (n.1) Look up quire at Dictionary.com
c. 1200, "set of four folded pages for a book; pamphlet consisting of a single quire," from Anglo-French quier, Old French quaier "sheet of paper folded in four," from Vulgar Latin *quaternus, from Latin quaterni "four each," from quater "four times" (from PIE root *kwetwer- "four"). Meaning "standard unit for selling paper" first recorded late 14c. In quires (late 15c.) means "unbound."
Quirinal Look up Quirinal at Dictionary.com
royal palace in Rome, 1838, from Mons Quirinalis in Rome (one of the seven hills, site of a former Papal palace), from Quirinus, said to be the divine name of Romulus, but really one of the original trinity of Roman gods, representing Mars. His feast (Quirinalia) was Feb. 17. Used metonymically for "the Italian civil government" (1917), especially as distinguished from the Vatican.
quirk (n.) Look up quirk at Dictionary.com
1560s, "quibble, evasion," of unknown origin, perhaps connected to German quer (see queer (adj.)) via notion of twisting and slanting; but its earliest appearance in western England dialect seems to argue against this source. Perhaps originally a technical term for a twist or flourish in weaving. Sense of "peculiarity" is c. 1600.
quirky (adj.) Look up quirky at Dictionary.com
1806, "shifty," from quirk + -y (2). Sense of "idiosyncratic" first recorded 1960. Related: Quirkily; quirkiness.
quirt (n.) Look up quirt at Dictionary.com
"short-handled braided leather riding whip," 1845, from Mexican Spanish cuarta "rope," related to Spanish cuerda "rope," from Latin corda (see cord (n.)).
quisling (n.) Look up quisling at Dictionary.com
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 (adj.) Look up quit at Dictionary.com
c. 1200, "free, clear" (of debt, etc.), from Old French quite, quitte "free, clear, entire, at liberty; discharged; unmarried," from Medieval Latin quitus, quittus, from Latin quietus "free" (in Medieval Latin "free from war, debts, etc."), also "calm, resting" (see quiet (adj.)).
quit (v.) Look up quit at Dictionary.com
c. 1200, "to repay, discharge" (a debt, etc.), from Old French quiter "clear, establish one's innocence;" also transitive, "release, let go, relinquish, abandon" (12c.), 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-rent (n.) Look up quit-rent at Dictionary.com
early 15c., "rent paid by a tenant in exchange for being discharged from required service;" also, "nominal rent as acknowledgment of tenure," from quit (adj.) + rent (n.).
quitclaim (n.) Look up quitclaim at Dictionary.com
"a relinquishing of a legal right or claim," c. 1300, from Anglo-French quiteclame; see quit (v.) + claim (n.). Compare Old French clamer quitte "to give up (a right)."
quite (adv.) Look up quite at Dictionary.com
early 14c., adverbial form of Middle English quit, quite (adj.) "free, clear" (see quit (adj.)). Originally "thoroughly;" the weaker sense of "fairly" is attested from mid-19c.
quits (adj.) Look up quits at Dictionary.com
"even" (with another), 1660s; earlier "discharged of a liability" (c. 1200), perhaps from Medieval Latin quittus (see quit (adj.)).
quittance (n.) Look up quittance at Dictionary.com
c. 1200, "payment, compensation;" c. 1300, "discharge from an obligation," from Old French quitance (Modern French quittance), from quiter (see quit (v.)).
quitter (n.) Look up quitter at Dictionary.com
as an insult, 1881, American English, agent noun from quit (v.).
quiver (n.) Look up quiver at Dictionary.com
"case for holding arrows," early 14c., from Anglo-French quiveir, Old French quivre, cuivre, probably of Germanic origin, from Proto-Germanic *kukur "container" (source also of Old High German kohhari, German Köcher, Old Saxon kokar, Old Frisian koker, Old English cocur "quiver"); "said to be from the language of the Huns" [Barnhart]. Related: Quiverful.
quiver (v.) Look up quiver at Dictionary.com
"to tremble," late 15c., perhaps imitative, or possibly an alteration of quaveren (see quaver), or from Old English cwifer- (in cwiferlice "zealously"), which is perhaps related to cwic "alive" (see quick (adj.)). Related: Quivered; quivering. As a noun in this sense from 1715, from the verb.
quixotic (adj.) Look up quixotic at Dictionary.com
"extravagantly chivalrous," 1791, from Don Quixote, romantic, impractical hero of Cervantes' satirical novel "Don Quixote de la Mancha" (1605; English translation by 1620). His name literally means "thigh," also "a cuisse" (a piece of armor for the thigh), in Modern Spanish quijote, from Latin coxa "hip." Related: Quixotical; quixotically.
quiz (n.) Look up quiz at Dictionary.com
"brief examination of a student on some subject," 1852, perhaps from quiz (v.), or from slang quiz "odd person" (1782, perhaps originally university slang), via the notion of "schoolboy prank or joke played at the expense of a person deemed a quiz" (a noun sense attested frequently 1840s).
A Quiz, in the common acceptation of the word, signifies one who thinks, speaks, or acts differently from the rest of the world in general. But, as manners and opinions are as various as mankind, it will be difficult to say who shall be termed a Quiz, and who shall not: each person indiscriminately applying the name of Quiz to every one who differs from himself .... ["The London Magazine," November, 1783]
According to OED, the anecdote that credits this word to a bet by the Dublin theater-manager Daly or Daley 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).
The word Quiz is a sort of a kind of a word
That people apply to some being absurd;
One who seems, as t'were oddly your fancy to strike
In a sort of a fashion you somehow don't like
A mixture of odd, and of queer, and all that
Which one hates, just, you know, as some folks hate a cat;
A comical, whimsical, strange, droll -- that is,
You know what I mean; 'tis -- in short, -- 'tis a quiz!

[from "Etymology of Quiz," Charles Dibdin, 1842]
quiz (v.) Look up quiz at Dictionary.com
1847, "to question," 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 spelling from 1854, perhaps in this case from apparently unrelated slang word quiz "odd person" (1782, source of quizzical). Compare quisby "queer, not quite right; bankrupt" (slang from 1807). From the era of radio quiz shows comes quizzee (n.), 1940.
quizzical (adj.) Look up quizzical at Dictionary.com
1789, from quiz (n.) "odd or eccentric person" (1782), a word of unknown origin, + -ical. Related: Quizzically.
quo warranto Look up quo warranto at Dictionary.com
Medieval Latin, literally "by what warrant," from quo "from, with, or by whom or what?," ablative of interrogative pronoun quis "who?" (from PIE root *kwo-, stem of relative and interrogative pronouns).
quod Look up quod at Dictionary.com
"prison," c. 1700, a cant slang word of unknown origin; perhaps a variant of quad in the "building quadrangle" sense.
quodlibet (n.) Look up quodlibet at Dictionary.com
"a nicety, subtlety," late 14c., Latin, literally "what you will, what you please," from quod "what," neuter of qui (from PIE root *kwo-, stem of relative and interrogative pronouns) + libet "it pleases" (from PIE root *leubh- "to care, desire, love").
quoin (n.) Look up quoin at Dictionary.com
1530s, "a cornerstone," variant spelling of coin (n.); in early use also in other senses of that word, including "a wedge."
quoit (n.) Look up quoit at Dictionary.com
late 14c., "curling stone," of uncertain origin, perhaps from Old French coite "flat stone" (with which the game was originally played), literally "cushion," variant of coilte (see quilt (n.)). 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.
quoits (n.) Look up quoits at Dictionary.com
late 14c., coytes, "game played by throwing quoits;" see quoit.
quondam (adj.) Look up quondam at Dictionary.com
"one-time, former," 1580s, from earlier use as an adverb ("formerly") and a noun ("former holder" of some office or position), both 1530s, from Latin quondam (adv.) "formerly, at some time, at one time; once in a while," from quom, cum "when, as" (from PIE root *kwo-, stem of relative and interrogative pronouns) + demonstrative ending -dam.
Quonset hut Look up Quonset hut at Dictionary.com
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 (adj.) Look up quorate at Dictionary.com
"attended by a quorum," 1969, from quorum + -ate (1).
quorum (n.) Look up quorum at Dictionary.com
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" (from PIE root *kwo-, stem of relative and interrogative pronouns). 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 usually were called the justices of the quorum. Meaning "fixed number of members whose presence is necessary to transact business" is first recorded 1610s.