Online Etymology Dictionary

parent (n.): early 15c. (late 12c. as a surname), from Old French parent "father, parent, relative, kin" (11c.), from Latin parentem (nominative parens) "father or mother, ancestor," noun use of present participle of parere "bring forth, give birth to, produce," from PIE root *pere- (1) "to bring forth" (see pare). Began to replace native elder after c. 1500.
paroxysm (n.): "sudden attack, convulsion," early 15c., from Middle French paroxysme (16c.), earlier paroxime (13c.), from Medieval Latin paroxysmus "irritation, fit of a disease," from Greek paroxysmos "irritation, exasperation," from paroxynein "to irritate, goad, provoke," from para- "beyond" (see para- (1)) + oxynein "sharpen, goad," from oxys "sharp, pointed" (see acrid). Non-medical sense first attested c. 1600. Related: Paroxysmal.
recondite (adj.): 1640s, "removed or hidden from view," from Old French recondit, from Latin reconditus, past participle of recondere "store away, hide, conceal, put back again, put up again, lay up," from re- "away, back" (see re-) + condere "to store, hide, put together," from con- "together" (see con-) + -dere "to put, place," comb. form of dare "to give" (see date (n.1)). Meaning "removed from ordinary understanding, profound" is from 1650s; of writers or sources, "obscure," it is recorded from 1817.
beluga (n.): 1590s, from Russian beluga, literally "great white," from belo- "white" (from PIE *bhel-o-, from root *bhel- (1) "to shine, flash, burn;" see bleach (v.)) + augmentative suffix -uga. Originally the great sturgeon, found in the Caspian and Black seas; later (1817) also the small white whale (Delphinapterus leucas) found in northern seas.
cervix (n.): early 15c., "ligament in the neck," from Latin cervix "the neck, nape of the neck," from PIE *kerw-o-, from root *ker- (1) "horn, head" (see horn (n.)). Applied to various neck-like structures of the body, especially that of the uterus (by 1702), where it is shortened from medical Latin cervix uteri (17c.). Sometimes in medical writing 18c.-19c. cervix of the uterus to distinguish it from the neck sense.
vile (adj.): late 13c., "morally repugnant; morally flawed, corrupt, wicked; of no value; of inferior quality; disgusting, foul, ugly; degrading, humiliating; of low estate, without worldly honor or esteem," from Anglo-French ville, Old French vil "shameful, dishonorable; low-born; cheap; ugly, hideous," from Latin vilis "cheap, worthless, base, common," of uncertain origin, perhaps from PIE root *wes- (1) "to buy, sell" (see venal). Related: Vilely; vileness; vilety (early 13c.).
vivid (adj.): 1630s, from French vivide and perhaps also directly from Latin vividus "spirited, animated, lively, full of life," from vivus "alive," from PIE *gweie- (1) "to live" (see bio-). Extension to colors is from 1660s. Sense of "strong, distinct" (as of memories, etc.) is from 1680s; that of "very active or intense" (as of imagination, interest, etc.) is from 1853. Related: Vividly; vividness.
air force (n.): 1917, from air (n.1) + force (n.); first attested with creation of the Royal Air Force. There was no United States Air Force until after World War II. The Air Corps was an arm of the U.S. Army. In 1942, the War Department reorganized it and renamed it Army Air Forces. The National Security Act of 1947 created the Department of the Air Force, headed by a Secretary of the Air Force, and the U.S.A.F.
enclose (v.): early 14c., from en- (1) + close, and partially from Old French enclos, past participle of enclore "surround; confine; contain." Specific sense of "to fence in waste or common ground" for the purpose of cultivation or to give it to private owners is from c. 1500. Meaning "place a document with a letter for transmission" is from 1707. Related: Enclosed; enclosing.
encroach (v.): late 14c., "acquire, get," from Old French encrochier "seize, fasten on, hang on (to), cling (to); hang up, suspend," literally "to catch with a hook," from en- "in" (see en- (1)) + croc "hook," from Old Norse krokr "hook" (see crook (n.)). Sense extended to "seize wrongfully" (c. 1400), then "trespass" (1530s). Related: Encroached; encroaches; encroaching.
enforce (v.): mid-14c., "to drive by physical force; to try, attempt, strive; to fortify, strengthen a place;" late 14c. as "exert force, compel; make stronger, reinforce; strengthen an argument; grow stronger, become violent," from Old French enforcier "strengthen, reinforce; use force (on), offer violence (to); oppress; violate, rape" (12c.) or a native formation from en- (1) "make, put in" + force (n.). Meaning "compel obedience to (a law, etc.) is from 1640s. Related: Enforced; enforcing.
enfranchise (v.): early 15c., "grant (someone) the status or privilege of citizenship, admit to membership in a town," from Old French enfranchiss-, present participle stem of enfranchir "to set or make free; grant a franchise to;" from en- "make, put in" (see en- (1)) + franc "free" (see franchise (n.)). Generally with reference to voting privileges after c. 1700. Related: Enfranchised; enfranchisement.
nirvana (n.): 1836, from Sanskrit nirvana-s "extinction, disappearance" (of the individual soul into the universal), literally "to blow out, a blowing out" ("not transitively, but as a fire ceases to draw;" a literal Latinization would be de-spiration), from nis-, nir- "out" + va- "to blow" (see wind (n.1)). Figurative sense of "perfect bliss" is from 1895.
injury (n.): late 14c., "harm, damage, loss; a specific injury," from Anglo-French injurie "wrongful action" (Old French injure, 13c.), from Latin iniuria "wrong, an injustice, insult, unlawful violence, assault, damage, harm," noun use of fem. of iniurius "wrongful, unjust, unlawful," from in- "not, opposite of" (see in- (1)) + ius (genitive iuris) "right, law" (see jurist).
inordinate (adj.): late 14c., "not ordered, lacking order or regularity," from Latin inordinatus "unordered, not arranged," from in- "not, opposite of" (see in- (1)) + ordinatus, past participle of ordinare "to set in order" (see order (n.)). Sense of "immoderate, excessive" is from notion of "not kept within orderly limits." Related: Inordinately; inordinateness.
insensible (adj.): c. 1400, "lacking the power to feel with the senses, numb, dazed" (now rare in this meaning), from Late Latin insensibilis "that cannot be felt," from in- "not" (see in- (1)) + sensibilis "having feeling: perceptible by the senses" (see sensible). Meaning "void of feeling, not susceptible to emotion or passion" is from 1610s. Meaning "incapable of being felt or perceived by the senses or the mind, so small or slight as to be imperceptible" is from late 14c. Compare insensate.
insensitive (adj.): c. 1600, "having little or no reaction to what is perceived by one's senses," from in- (1) "not, opposite of" + sensitive. For sense, see insensate. From 1834 as "having little or no mental or moral sensitiveness;" meaning "without consideration for the feelings of others" attested by 1974. Related: Insensitively.
inspection (n.): late 14c., from Old French inspeccion "inspection, examination" (13c., Modern French inspection), from Latin inspectionem (nominative inspectio) "a looking into," noun of action from past participle stem of inspicere "look at, observe, view; look into, inspect, examine," from in- "into" (see in- (2)) + specere "to look" (see scope (n.1)). Related: Inspectional.
insuperable (adj.): mid-14c., "unconquerable, incapable of being surmounted," from Old French insuperable (14c.) or directly from Latin insuperabilis "that cannot be passed over, unconquerable," from in- "not, opposite of" (see in- (1)) + superabilis "that may be overcome," from superare "to overcome," from superus "one that is above," from super "over" (see super-). Figurative use from 1650s. Related: Insuperably; insuperability.
insurance (n.): 1550s, "engagement to marry," a variant of ensurance "an assurance, pledge, guarantee," from Old French enseurance "assurance," from ensurer, from en- "make" (see en- (1)) + sur "safe, secure, undoubted" (see sure (adj.)).

Commercial sense of "security against loss or death in exchange for payment" is from 1650s. Assurance was the older word for this specific sense (late 16c.). Compare insure.
insure (v.): mid-15c., insuren, spelling variant of ensuren "to assure, give formal assurance" (late 14c.), also "make secure, make safe" (c. 1400), from Anglo-French enseurer, Old French ensurer, from en- "make" (see en- (1)) + seur, sur "safe, secure, undoubted" (see sure (adj.)).

The particular commercial senses of "make safe against loss by payment of premiums; undertake to ensure against loss, etc." are from mid-17c. (replacing assure in that meaning). Related: Insured; insuring.
intangible (adj.): 1630s, "incapable of being touched," from French intangible (c. 1500) or directly from Medieval Latin intangibilis, from in- "not" (see in- (1)) + Late Latin tangibilis "that may be touched" (see tangible). Figurative sense of "that cannot be grasped by the mind" is from 1880. Noun meaning "anything intangible" is from 1909. Related: Intangibly.
integrate (v.): 1630s, "to render (something) whole, bring together the parts of," from Latin integratus, past participle of integrare "make whole," from integer "whole, complete," figuratively, "untainted, upright," literally "untouched," from in- "not" (see in- (1)) + root of tangere "to touch," from PIE root *tag- "to touch, handle" (see tangent (adj.)).

The meaning "put together parts or elements and combine them into a whole" is from 1802. The "racially desegregate" sense (1940) probably is a back-formation from integration. Related: Integrated; integrating.
flaunt (v.): 1560s, "to display oneself in flashy clothes," of unknown origin. Perhaps a variant of flout or vaunt. Perhaps from Scandinavian, where the nearest form seems to be Swedish dialectal flankt "loosely, flutteringly," from flakka "to waver" (related to flag (v.1)). It looks French, but it corresponds to no known French word. Transitive sense, "flourish (something), show off, make an ostentatious or brazen display of" is from 1827. Related: Flaunted; flaunting; Flauntingly.
gourmet (n.): "connoisseur in eating and drinking," 1820, from French gourmet, altered (by influence of Middle French gourmant "glutton") from Old French groume, originally "wine-taster, wine merchant's servant" (in 13c. "a lad generally"), a word of uncertain origin. As an adjective from 1900. Compare groom (n.1). For sense distinction, see gourmand.
heliacal (adj.): "pertaining to the sun" (but used especially of stars, in reference to their becoming visible out of the sun's glare), c. 1600, with -al (1) and Latinized form of Greek heliakos "of the sun," from helios "sun" (see sol). The heliacal year is reckoned from the heliacal rising of Sirius; thus it also is known as the canicular year. Related: Heliacally (1580s).
henotheism (n.): "devotion to a single god without asserting that he or she is the only god," 1860, from Greek henos, neuter of heis "one" (from PIE *sem- (1) "one, as one;" see same) + theism. Coined by (Friedrich) Max Müller (1823-1900), professor of comparative philology at Oxford. Supposedly a characteristic of the oldest Hindu religion; or a system between monotheism and polytheism. Related: Henotheist; henotheistic.
fluke (n.2): "lucky stroke, chance hit," 1857, also flook, said to be originally a lucky shot at billiards, of uncertain origin. Century Dictionary connects it with fluke (n.1) in reference to the whale's use of flukes to get along rapidly (to go a-fluking or some variant of it, "go very fast," is in Dana, Smyth, and other sailors' books of the era). OED (2nd ed. print) allows only that it is "Possibly of Eng. dialectal origin."
flush (adj.): 1550s, "perfect, faultless;" c. 1600, "abundantly full," also "full of life or spirit," also "plentifully supplied" (with money, etc.), perhaps from flush (v.1) through the notion of a river running full, hence level with its banks. Meaning "even, level" is from 1620s, originally of ship's decks. In general use by 1791; in typography, 1900; in pugilism, 1812.
flyer (n.): also flier, mid-15c., "that which flies, thing or creature that flies," agent noun of fly (v.1). Meaning "something that goes fast" is from 1795. Meaning "speculative investment, financial venture" is from 1846 (on the notion of a "flying leap"). Meaning "small handbill or fly-sheet" is from 1889, U.S. slang (originally especially of police bulletins), on notion of "made to be scattered broadcast." Meaning "aviator" (1916) developed in World War I. Related: Fliers; flyers.
hierophant (n.): "expounder of sacred mysteries," 1670s, from Late Latin hierophantes, from Greek hierophantes "one who teaches the rites of sacrifice and worship," literally "one who shows sacred things," from hieros "sacred," from extended form of PIE root *bha- (1) "to shine" (see ire) + phainein "to reveal, bring to light" (see phantasm). In modern use, "expounder of esoteric doctrines," from 1822.
enrich (v.): late 14c., "to make wealthy," from Old French enrichir "enrich, enlarge," from en- "make, put in" (see en- (1)) + riche "rich" (see rich). Figurative sense "supply with abundance of something desirable" is from 1590s. Meaning "to fertilize" is from c. 1600. Scientific sense of "to increase the abundance of a particular isotope in some material" is first attested 1945. Related: Enriched; enriching.
entail (v.): mid-14c., "convert (an estate) into 'fee tail' (feudum talliatum)," from en- (1) "make" + taile "legal limitation," especially of inheritance, ruling who succeeds in ownership and preventing the property from being sold off, from Anglo-French taile, Old French taillie, past participle of taillier "allot, cut to shape," from Late Latin taliare "to split" (see tailor (n.)). Sense of "have consequences" is 1829, via the notion of "inseparable connection." Related: Entailed; entailling; entailment.
entreat (v.): c. 1400, "to enter into negotiations," especially "discuss or arrange peace terms;" also "to treat (someone) in a certain way," from Anglo-French entretier, Old French entraiter "to treat," from en- "make" (see en- (1)) + traiter "to treat" (see treat (v.)). Meaning "to beseech, implore, plead with (someone)" is from early 15c.; meaning "to plead for (someone)" is from mid-15c. Related: Entreated; entreating.
envelop (v.): late 14c., envolupen, "be involved" (in sin, crime, etc.), from Old French envoleper "envelop, cover; fold up, wrap up" (10c., Modern French envelopper), from en- "in" (see en- (1)) + voloper "wrap up," which is of uncertain origin, perhaps Celtic (see Gamillscheg, Diez) or Germanic ("Century Dictionary"). Literal sense is from 1580s. Related: Enveloped; enveloping.
epaulet (n.): also epaulette, "shoulder ornament on a uniform," 1783, from French épaulette "an epaulet" (16c.), diminutive of épaule "shoulder," from Old French espaule (12c.), from Latin spatula "flat piece of wood, splint," in Medieval Latin "shoulder blade," diminutive of spatha "broad wooden instrument, broad sword," from Greek spathe "a broad flat sword" (see spade (n.1)).
margin (n.): mid-14c., "edge of a sea or lake;" late 14c., "space between a block of text and the edge of a page," from Latin marginem (nominative margo) "edge, brink, border, margin," from PIE *merg- "edge, border, boundary" (see mark (n.1)). General sense of "boundary space; rim or edge of anything" is from late 14c. Meaning "comfort allowance, cushion" is from 1851; margin of safety first recorded 1888. Stock market sense of "sum deposited with a broker to cover risk of loss" is from 1848. Related: Margins.
margrave (n.): military governor of a German border province, 1550s, from Middle Dutch markgrave (Dutch markgraaf), literally "count of the border," from Old High German marcgravo; second element from graf "count, earl" (Old High German gravo, gravjo), from West Germanic *grafa "a designation of rank, possibly borrowed from Greek grapheus "scribe." For first element see mark (n.1). Later a hereditary title under the Holy Roman Empire. His wife was a margravine.
marque (n.): "seizure by way of reprisal," mid-15c., in letters of marque "official permission to capture enemy merchant ships," from Anglo-French mark (mid-14c.), via Old French from Old Provençal marca "reprisal," from marcar "seize as a pledge, mark," probably from a Germanic source (compare Old High German marchon "delimit, mark;" see mark (n.1)), but the sense evolution is difficult.
marquis (n.): also marquess, c. 1300, title of nobility, from Old French marchis, literally "ruler of a border area," from Old French marche "frontier," from Medieval Latin marca "frontier, frontier territory" (see march (n.1)). Originally the ruler of border territories in various European regions (such as Italian marchese, Spanish marqués); later a mere title of rank, below duke and above count. Related: Marquisate.
massage (n.): 1874, from French massage "friction of kneading," from masser "to massage," possibly from Arabic massa "to touch, feel, handle;" if so, probably picked up in Egypt during the Napoleonic campaign there. Other possibility is that French got it in colonial India from Portuguese amassar "knead," a verb from Latin massa "mass, dough" (see mass (n.1)). Massage parlor first attested 1894, from the start a euphemism for "house of prostitution."
matrix (n.): late 14c., "uterus, womb," from Old French matrice "womb, uterus," from Latin matrix (genitive matricis) "pregnant animal," in Late Latin "womb," also "source, origin," from mater (genitive matris) "mother" (see mother (n.1)). Sense of "place or medium where something is developed" is first recorded 1550s; sense of "embedding or enclosing mass" first recorded 1640s. Logical sense of "array of possible combinations of truth-values" is attested from 1914. As a verb from 1951.
mature (v.): late 14c., "encourage suppuration;" mid-15c. "bring to maturity," from Latin maturare "to ripen, bring to maturity," from maturus "ripe, timely, early," related to manus "good" and mane "early, of the morning," from PIE root *ma- (1) "good," with derivatives meaning "occurring at a good moment, timely, seasonable, early." Meaning "come or bring to maturity" is from 1620s. The financial sense of "reach the time for payment" is from 1861. Related: Matured; maturing.
remark (v.): 1630s, "to mark out, distinguish" modeled on French remarquer "to mark, note, heed," formed in Middle French from re-, intensive prefix (see re-), + marquer "to mark," probably from a Germanic source such as Old High German marchon "to delimit" (see mark (n.1)).

Meaning "take notice of" is from 1670s; that of "make a comment" is first attested 1690s, from notion of "make a verbal observation" or "call attention to specific points." Related: Remarked; remarking.
patch (n.2): "fool, clown," 1540s, perhaps from Italian pazzo "fool," of unknown origin. Possibly from Old High German barzjan "to rave" [Klein]. But Buck says pazzo is originally euphemistic, and from Latin patiens "suffering," in medical use, "the patient." Form perhaps influenced by folk etymology derivation from patch (n.1), on notion of a fool's patched garb.
patter (v.2): "talk rapidly," c. 1400, from pater "mumble prayers rapidly" (c. 1300), shortened form of paternoster. Perhaps influenced by patter (v.1). The related noun is first recorded 1758, originally "cant language of thieves and beggars." Compare Devil's paternoster (1520s) "a grumbling and mumbling to oneself."
PATTERING. The maundering or pert replies of servants; also talk or palaver in order to amuse one intended to be cheated. [Grose, "Classical Dictionary of the Vulgar Tongue," 2nd edition. 1788]
pawn (n.2): lowly chess piece, late 14c., from Anglo-French poun, Old French peon, earlier pehon, from Medieval Latin pedonem "foot soldier," from Late Latin pedonem (nominative pedo) "one going on foot," from Latin pes (genitive pedis) "foot," from PIE root *ped- (1) "a foot" (see foot (n.)). The chess sense was in Old French by 13c. Figurative use, of persons, is from 1580s.
refute (v.): 1510s, "refuse, reject," from Middle French réfuter (16c.) and directly from Latin refutare "drive back; rebut, disprove; repress, repel, resist, oppose," from re- "back" (see re-) + -futare "to beat," probably from PIE root *bhau- "to strike down" (see bat (n.1)).

Meaning "prove wrong" dates from 1540s. Since c. 1964 linguists have frowned on the subtle shift in meaning towards "to deny," as it is used in connection with allegation. Related: Refuted; refuting.
theoretical (adj.): 1610s, "contemplative," with -al (1) + Late Latin theoreticus "of or pertaining to theory," from Greek theoretikos "contemplative, speculative, pertaining to theory" (by Aristotle contrasted to praktikos), from theoretos "that may be seen or considered," from theorein "to consider, look at" (see theory). Meaning "pertaining to theory, making deductions from theory not from fact" (opposed to practical) is from 1650s; earlier in this sense was theorical (c. 1500). Meaning "ideal, hypothetical" is from 1790s (implied in theoretically). Related: theoretician.
windlass (n.): device for raising weights by winding a rope round a cylinder, c. 1400, alteration of wyndase (late 13c.), from Anglo-French windas, and directly from a Scandinavian source such as Old Norse vindass, from vinda "to wind" (see wind (v.1)) + ass "pole, beam" (cognate with Gothic ans "beam, pillar").