gigabyte (n.) Look up gigabyte at Dictionary.com
1982, from giga- "billion" + byte.
gigantic (adj.) Look up gigantic at Dictionary.com
1610s, "pertaining to giants," from Latin gigant- stem of gigas "giant" (see giant) + -ic. Replaced earlier gigantine (c.1600), gigantical (c.1600), giantlike (1570s). The Latin adjective was giganteus. Of material or immaterial things, actions, etc., "of extraordinary sine or proportions," by 1797.
gigantism (n.) Look up gigantism at Dictionary.com
medical condition causing abnormal increased size, 1854, from Latin gigant- "giant" (see gigantic) + -ism.
gigaton (n.) Look up gigaton at Dictionary.com
by 1977, from giga- + ton.
giggle (v.) Look up giggle at Dictionary.com
c.1500, probably imitative. Related: Giggled; giggling; giggly. As a noun from 1570s.
giglot (n.) Look up giglot at Dictionary.com
"lewd, wanton woman" (mid-14c.); later "a giddy, romping girl;" of unknown origin; compare gig (n.1).
gigolo (n.) Look up gigolo at Dictionary.com
"professional male escort or dancing partner, young man supported financially by an older woman in exchange for his attentions," 1922, from French gigolo, formed as a masc. of gigole "tall, thin woman; dancing girl; prostitute," perhaps from verb gigoter "to move the shanks, hop," from gigue "shank" (12c.), also "fiddle," Old French giga from Frankish *giga- or some other Germanic word (compare German Geige "fiddle"). This is perhaps the same word that was borrowed earlier as Middle English giglot (early 14c.) "lewd, wanton girl," which was later applied to males (mid-15c.) with the sense "villainous man." It is perhaps related to a number of words in Germanic meaning "dance, gambol," and "fiddle," perhaps connected by the notion of "rapid, whirling motion" (see gig (n.1)). Middle English gigletry meant "lasciviousness, harlotry" (late 14c.).
Naturally, no decent French girl would have been allowed for a single moment to dance with a gigolo. But America, touring Europe like mad after years of enforced absence, outnumbered all other nations atravel ten to one. [Edna Ferber, "Gigolo," 1922]
gila monster (n.) Look up gila monster at Dictionary.com
"poisonous lizard of the American southwest" (Heloderma suspectum), 1877, American English, from Gila River, which runs through its habitat in Arizona. The river name probably is from an Indian language, but it is unknown now which one, or what the word meant in it.
Gilbert Look up Gilbert at Dictionary.com
masc. proper name, from Old French Guillebert (from Old High German Williberht, literally "a bright will") or Old French Gilebert, from Gisilbert, literally "a bright pledge," from Old High German gisil "pledge," a Celtic loan-word (compare Old Irish giall "pledge") + beorht "bright" (see Albert). It was the common name for a male cat (especially in short form Gib) from c.1400 (see Tom). As a unit of magneto-motive force, it honors English physicist William Gilbert (1544-1603). For the Gilbert Islands, see Kiribati.
gild (v.) Look up gild at Dictionary.com
Old English gyldan "to gild, to cover with a thin layer of gold," from Proto-Germanic *gulthjan (cognates: Old Norse gylla "to gild," Old High German ubergulden "to cover with gold"), from *gulthan "gold" (see gold). Related: Gilded; gilding. Figuratively from 1590s.
gilded (adj.) Look up gilded at Dictionary.com
1560s, past participle adjective from gild (v.). Late Old English had gegylde; Middle English had gilden (adj.). In modern use the more dignified past participle of gild, alternative to gilt. Shakespeare's lilies were never gilded; the quote ("King John," iv.2) is, "To gild refined gold, to paint the lily." Gilded Age as an era in U.S. history (roughly 1870-1900) is from the novel "The Gilded Age" by Mark Twain and Charles Dudley Warner, published in 1873.
gilding (n.) Look up gilding at Dictionary.com
mid-15c., "action of gilding;" 1630s, "golden surface produced by gilding;" verbal noun from gild (v.).
Gilead Look up Gilead at Dictionary.com
Biblical site (Gen. xxxi:21, etc.), traditionally from the name of a grandson of Manasseh, perhaps from Aramaic gal "heap of stones."
Giles Look up Giles at Dictionary.com
masc. proper name, from Old French Gilles, from Latin Egidius, Aegidius (name of a famous 7c. Provençal hermit who was a popular saint in the Middle Ages), from Greek aigidion "kid" (see aegis). Often used in English as a typical name of a simple-minded farmer.
gill (n.1) Look up gill at Dictionary.com
"organ of breathing in fishes," early 14c., of unknown origin, perhaps related to Scandinavian words, such as Old Norse gjölnar which perhaps means "gills," and Old Danish -gæln (in fiske-gæln "fish gill"); said to be ultimately from a PIE *ghel-una- "jaw" (cognate: Greek kheilos "lip"). Related: Gills.
gill (n.2) Look up gill at Dictionary.com
liquid measure (commonly a half-pint), late 13c., from Old French gille, a wine measure, and from Medieval Latin gillo "earthenware jar," words of uncertain origin, perhaps related to the source of gallon.
Gill Look up Gill at Dictionary.com
fem. proper name, shortened form of Gillian. Also see Jill. Gill-flirt "giddy young woman" is from 1630s.
Gillian Look up Gillian at Dictionary.com
fem. proper name, from French Juliane, from Late Latin Juliana (a saint's name), fem. of Iulianus, literally "of Julius," the Roman gens name (see Julius).
gillyflower (n.) Look up gillyflower at Dictionary.com
type of flowering plant, 1550s, folk etymology alteration (by association with unrelated flower) of gilofre "gillyflower" (late 14c.), originally "clove" (c.1300), from Old French girofle "clove" (12c.), from Latin caryophyllon, from Greek karyophyllon "clove, nut leaf, dried flower bud of clove tree," from karyon "nut" (see karyo-) + phyllon "leaf" (see phyllo-). The flower so named for its scent.
gilt (adj.) Look up gilt at Dictionary.com
"gilded," c.1400, past participle of Middle English gilden "to gild," from Old English gyldan (see gild (v.)). Also used as a noun with a sense of "gilding" (early 15c.).
gimbal (n.) Look up gimbal at Dictionary.com
1570s, "joints, connecting links," alteration of gemel "twins" (late 14c.), from Old French jumel "a twin" (12c., Modern French jumeau), from Latin gemellus, diminutive of geminus (adj.) "twin, born together" (see geminate). As a type of contrivance for securing free motion in suspension, by 1780. Related: Gimbals. Gemmels (plural) was Middle English for "twins" (latge 14c.), also "Gemini," from Old French gemeles; hence also gemel ring, a double finger-ring that may be taken apart; also gimmal.
gimcrack (n.) Look up gimcrack at Dictionary.com
"trifle, knick-knack," by c.1820, earlier "mechanical contrivance" (1630s), originally "showy person" (1610s), of uncertain origin. Perhaps an alteration of Middle English gibecrake, the name of some kind of ornament on wooden furniture (mid-14c.), which is perhaps from Old French giber "to rattle, shake" + some special sense of Middle English crak "sharp noise, crack." In 18c.-19c. gimcrack also could mean "person who has a turn for mechanical contrivances."
gimlet (n.) Look up gimlet at Dictionary.com
type of boring tool, mid-14c., gymbelette, from Anglo-French and Old French guimbelet, guibelet (12c., Modern French gibelet), which is probably of Germanic origin, perhaps from Middle Dutch wimmelkijn (with substitute of French diminutive suffix), diminutive of wimmel "auger, drill." Middle English also had wimble in the same sense (mid-13c.), probably from an Old North French form of the same word. As the name of a cocktail made with gin or vodka and lime juice, by 1928, presumably from its "penetrating" effects on the drinker.
gimme (v.) Look up gimme at Dictionary.com
by 1828, representing the colloquial contraction of give me. To have the gimmes "be eagerly greedy" is from 1918; gimme cap attested by 1978. Middle English had yemme, gemme, contractions of yeve me (Middle English form of give me).
TOMMY -- Gimme a cake.
MAMMA -- If what? -- If you please .
TOMMY -- O, let up on that Pinafore business; gimme a cake!
["Puck," July 2, 1878]
gimmick (n.) Look up gimmick at Dictionary.com
1910, American English, perhaps an alteration of gimcrack, or an anagram of magic.
In a hotel at Muscatine, Iowa, the other day I twisted the gimmick attached to the radiator, with the intention of having some heat in my Nova Zemblan booth. ["Domestic Engineering," January 8, 1910]
gimmickry (n.) Look up gimmickry at Dictionary.com
also gimmickery, by 1950, from gimmick + -ry.
gimmicky (adj.) Look up gimmicky at Dictionary.com
1948, from gimmick + -y (2).
gimp (n.1) Look up gimp at Dictionary.com
1925, "a crippled leg," also "a crippled person" (1929), perhaps by association with limp, or a corruption of gammy (see game (adj.)).
gimp (n.2) Look up gimp at Dictionary.com
also gymp, ornamental material for trimming dresses, furniture, etc., 1660s, probably from French guimpe, Old French guimple "wimple, headdress, veil" (12c.), from Frankish *wimpil- or some other Germanic source (compare Old High German wimpal, and see wimple).
gimpy Look up gimpy at Dictionary.com
1925 as a noun, "lame person;" 1931 as an adjective, "lame, crippled," hobo slang, from gimp (n.1) + -y (3) and (2).
gin (n.1) Look up gin at Dictionary.com
type of distilled drinking alcohol, 1714, shortening of geneva, altered (by influence of the name of the Swiss city, with which it has no connection) from Dutch genever "gin," literally "juniper" (because the alcohol was flavored with its berries), from Old French genevre "the plant juniper" (12c.), from Vulgar Latin *jeniperus, from Latin juniperus "juniper" (see juniper). Gin and tonic is attested by 1873; gin-sling by 1790; gin-fizz (with lemon juice and aerated water) is from 1878. Gin-mill, U.S. slang for "low-class tavern or saloon where spirits are drunk" (1872) might be a play on the senses from gin (n.2). British gin-palace "gaudily decorated tavern or saloon where spirits are drunk" is from 1831.

The card game gin rummy first attested 1941 (described in "Life" that year as the latest Hollywood fad); OED lists it with the entries for the liquor, but the sense connection seems obscure other than as a play on rummy.
gin (n.2) Look up gin at Dictionary.com
"machine for separating cotton from seeds," 1796, American English, used earlier of other machineries, especially of war or torture, from Middle English gin "ingenious device, contrivance" (c.1200), from Old French gin "machine, device, scheme," shortened form of engin (see engine). The verb in this sense is recorded from 1789. Related: Ginned; ginning. Middle English had ginful "ingenious, crafty; guileful, treacherous" (c.1300).
gin (v.1) Look up gin at Dictionary.com
in slang phrase gin up "enliven, make more exciting," 1887 (ginning is from 1825), perhaps a special use of the verb associated with gin (n.2) "engine," but perhaps rather or also from ginger up in the same sense (1849), which is from ginger in sense of "spice, pizzazz;" specifically in reference to the treatment described in the 1811 edition of Grose's slang dictionary under the entry for feague:
... to put ginger up a horse's fundament, and formerly, as it is said, a live eel, to make him lively and carry his tail well; it is said, a forfeit is incurred by any horse-dealer's servant, who shall shew a horse without first feaguing him. Feague is used, figuratively, for encouraging or spiriting one up.
gin (v.2) Look up gin at Dictionary.com
"to begin," c.1200, ginnen, shortened form of beginnen (see begin).
ginger (n.) Look up ginger at Dictionary.com
mid-14c., from Old English gingifer, gingiber, from Late Latin gingiber, from Latin zingiberi, from Greek zingiberis, from Prakrit (Middle Indic) singabera, from Sanskrit srngaveram, from srngam "horn" + vera- "body," so called from the shape of its root. But this may be Sanskrit folk etymology, and the word may be from an ancient Dravidian word that also produced the Malayalam name for the spice, inchi-ver, from inchi "root."

The word apparently was readopted in Middle English from Old French gingibre (12c., Modern French gingembre). In reference to coloring, by 1785 of fighting cocks, 1885 of persons (gingery with reference to hair is from 1852). Meaning "spirit, spunk, temper" is from 1843, American English (see gin (v.1)). Ginger-ale is recorded by 1822, the term adopted by manufacturers to distinguish their product from ginger beer (1809), which was sometimes fermented. Ginger-snap as a type of hard cookie flavored with ginger is from 1855, American English.
gingerbread (n.) Look up gingerbread at Dictionary.com
late 13c., gingerbrar, "preserved ginger," from Old French ginginbrat "ginger preserve," from Medieval Latin gingimbratus "gingered," from gingiber (see ginger). The ending changed by folk etymology to -brede "bread," a formation attested by mid-14c. Meaning "sweet cake spiced with ginger" is from 15c. Figurative use, indicating anything considered showy and insubstantial, is from c.1600. Sense of "fussy decoration on a house" is first recorded 1757; gingerbread-work (1748) was a sailor's term for carved decoration on a ship. Gingerbread-man as a confection is from 1850; the rhyme ("The Chase of the Gingerbread Man," by Ella M. White) is from 1898.
gingerly (adv.) Look up gingerly at Dictionary.com
"extremely cautiously" (of movements, etc.), c.1600, earlier "elegantly, daintily" (1510s), of unknown origin. Perhaps [OED] from Old French gensor, comparative of gent "dainty, delicate," from Latin gentius "(well)-born" (see gentle). Meaning "extremely cautiously" is from c.1600.
gingham (n.) Look up gingham at Dictionary.com
cotton fabric woven of plain dyed yarns, 1610s, from Dutch gingang, a traders' rendering of a Malay word said to be ginggang, meaning "striped" [OED], or else "perishable, fading" [Century Dictionary], used as a noun with the sense of "striped cotton." Also from the same source are French guingan (18c.), Spanish guinga, Italian gingano, German gingang.
gingival (adj.) Look up gingival at Dictionary.com
1660s, from Latin gingivae "the gums" (of unknown origin) + -al (1).
gingivitis (n.) Look up gingivitis at Dictionary.com
1874, from Latin gingivae "the gums" (of unknown origin) + -itis "inflammation."
gink (n.) Look up gink at Dictionary.com
"a fellow, man," American English slang, 1910, of unknown origin.
ginkgo (n.) Look up ginkgo at Dictionary.com
1773, from Japanese ginkyo, from Chinese yin-hing, from yin "silver" + hing "apricot" (Sino-Japanese kyo). Introduced to New World 1784 by William Hamilton in his garden near Philadelphia; also formerly known as the maidenhair-tree, from resemblance of the tree's leaves to those of the fern.
Ginnie Mae Look up Ginnie Mae at Dictionary.com
1970, fleshed out in the form of a fem. proper name, from GNMA, acronym of Government National Mortgage Association.
ginormous (adj.) Look up ginormous at Dictionary.com
by 1948, perhaps 1942, apparently originally a World War II military colloquialism, from a merger of gigantic + enormous.
ginseng (n.) Look up ginseng at Dictionary.com
type of plant whose root is highly valued as a tonic and stimulant in Chinese herbology, 1650s, from Chinese jen-shen. First element means "man," but the meaning of the second is obscure.
Gioconda Look up Gioconda at Dictionary.com
La Gioconda, name of the da Vinci painting also known as the Mona Lisa (q.v.), from Italian Gioconda, fem. of Giocondo, the surname of her husband (Francesco del Giocondo); the name is from Late Latin jocundus, literally "pleasing, pleasant" (see jocund). Hence the French name of the painting, La Joconde.
gip Look up gip at Dictionary.com
attested from 1840 as an abbreviation of gipsy (also see gypsy). Also see gyp. Related: Gipped; gipping.
Gipsy Look up Gipsy at Dictionary.com
alternative spelling of Gypsy. OED gives it precedence, and it is the main form for the word's entry in Century Dictionary, but Fowler writes that "the first y is highly significant, reminding us that Gypsy means Egyptian ...."
giraffe (n.) Look up giraffe at Dictionary.com
long-necked ruminant animal of Africa, 1590s, giraffa, from Italian giraffa, from Arabic zarafa, probably from an African language. Earlier Middle English spellings varied wildly, depending on the foreign source, and included jarraf, ziraph, and gerfauntz, some apparently directly from Arabic, the last reflecting some confusion with olifaunt "elephant."
In Arabye, þei ben clept Gerfauntz; þat is a best pomelee or spotted .. but a lityll more high þan is a stede, But he hath the necke a xxti cubytes long. [Mandeville's Travels, c.1425]
The modern form of the English word is attested by c.1600 and is via French girafe (13c.). Replaced earlier camelopard, a compound of camel (for the long neck) and pard (n.1) "leopard" (for the spots).
girandole (n.) Look up girandole at Dictionary.com
1630s, a type of fireworks; 1769 as a branched holder for candles; 1825 as a type of earring or pendant, from French girandole, from Italian girandola, diminutive of giranda "a revolving jet," from Latin gyrandus, gerundive of gyrare "to turn round in a circle, revolve" (see gyration). Also in English in the Italian form.