fulfill (v.) Look up fulfill at Dictionary.com
Old English fullfyllan "fill up, make full," from full + fyllan (see fill, which is ultimately from the root of full). Used early of prophecy and perhaps a translation of Latin implere, adimplere. Related: Fulfilled; fulfilling.
fulfillment (n.) Look up fulfillment at Dictionary.com
1775, from fulfill + -ment.
fulgent (adj.) Look up fulgent at Dictionary.com
early 15c., from Latin fulgentem (nominative fulgens) "shining, bright," present participle of fulgere "to shine" (see fulminate).
full (adj.) Look up full at Dictionary.com
Old English full "completely, full, perfect, entire, utter," from Proto-Germanic *fullaz (cognates: Old Saxon full, Old Frisian ful, Old Norse fullr, Old High German fol, German voll, Gothic fulls), from PIE *pele- (1) "to fill" (see poly-).

Adverbial sense was common in Middle English (full well, full many, etc.). Related: Fuller; fullest. Full moon was Old English fulles monan; first record of full-blood in relation to racial purity is from 1812. Full house is 1710 in the theatrical sense, 1887 in the poker sense.
full (v.) Look up full at Dictionary.com
"to tread or beat cloth to cleanse or thicken it," late 14c., from Old French fouler, from Latin fullo (see foil (v.)); Old English had the agent-noun fullere, probably directly from Latin fullo.
full time Look up full time at Dictionary.com
also fulltime, full-time, 1898; full-timer is attested from 1868; see full (adj.) + time (n.).
full-blown (adj.) Look up full-blown at Dictionary.com
1640s, of flowers, from full (adj.) + past participle of blow (v.2) "to bloom." Figuratively "complete, fully developed" from 1650s. Blown "that has blossomed" is from Old English geblowenne. Full-blown also was used 17c.-18c. of cheeks, sails, bladders and in this case is from blow (v.1) and the figurative sense might also partake of these.
full-fledged (adj.) Look up full-fledged at Dictionary.com
1883 in figurative sense; see full (adj.) + fledge.
fuller (n.) Look up fuller at Dictionary.com
"one who fulls cloth," Old English fullere, from Latin fullo "fuller" (see foil (v.)). The substance called fuller's earth (silicate of alumina) is first recorded 1520s, so called because it was used in cleansing cloth.
fullness (n.) Look up fullness at Dictionary.com
early 14c., from full (adj.) + -ness. Apparently not a survival of Old English fulnes.
fully (adv.) Look up fully at Dictionary.com
Old English fullice "entirely, perfectly, completely;" see full (adj.) + -ly (2).
fulminant (adj.) Look up fulminant at Dictionary.com
c.1600, from French fulminant or directly from Latin fulminantem (nominative fulminans), present participle of fulminare (see fulminate). As a noun from 1808.
fulminate (v.) Look up fulminate at Dictionary.com
early 15c., "publish a 'thundering' denunciation," from Latin fulminatus, past participle of fulminare "hurl lightning, lighten," from fulmen (genitive fulminis) "lightning flash," related to fulgere "to shine, flash," from PIE *bhleg- "to shine, flash," from root *bhel- (1) "to shine, flash, burn" (see bleach (v.)). Metaphoric sense (the original sense in English) is via its use in reference to a formal ecclesiastical censure. Related: Fulminated; fulminating.
fulmination (n.) Look up fulmination at Dictionary.com
c.1500, from Middle French fulmination, from Latin fulminationem (nominative fulminatio) "discharge of lightning," noun of action from past participle stem of fulminare (see fulminate).
fulsome (adj.) Look up fulsome at Dictionary.com
Middle English compound of ful "full" (see full (adj.)) + -som (see -some (1)). Sense evolved from "abundant, full" (mid-13c.) to "plump, well-fed" (mid-14c.) to "overgrown, overfed" (1640s) and thus, of language, "offensive to taste or good manners" (1660s). Since the 1960s, however, it commonly has been used in its original, favorable sense, especially in fulsome praise. Related: Fulsomely; fulsomeness.
fumble (v.) Look up fumble at Dictionary.com
mid-15c., "handle clumsily," possibly from Old Norse falma "to fumble, grope." Similar words in Scandinavian and North Sea Germanic suggest onomatopoeia from a sound felt to indicate clumsiness (compare bumble, stumble, and obsolete English famble, fimble of roughly the same meaning). Related: Fumbled; fumbling.
fumble (n.) Look up fumble at Dictionary.com
1640s, from fumble (v.).
fume (n.) Look up fume at Dictionary.com
late 14c., from Old French fum "smoke, steam, vapor, breath," from Latin fumus "smoke, steam, fume" (source of Italian fumo, Spanish humo), from PIE *dheu- (1) "dust, vapor, smoke; to rise in a cloud, to fly about (like dust)" (cognates: Sanskrit dhumah, Old Church Slavonic dymu, Lithuanian dumai, Old Prussian dumis "smoke," Middle Irish dumacha "fog," Greek thymos "spirit, mind, soul").
fume (v.) Look up fume at Dictionary.com
c.1400, "to fumigate," from Old French fumer, from Latin fumare "to smoke, steam," from fumus "smoke, steam, fume" (see fume (n.)). Figurative sense of "show anger" is first recorded 1520s. Related: Fumed; fumes; fuming.
fumigate (v.) Look up fumigate at Dictionary.com
1520s, back-formation from fumigation. Related: Fumigated; fumigating.
fumigation (n.) Look up fumigation at Dictionary.com
late 14c., "make aromatic smoke as part of a ceremony," from Old French fumigation, from Latin fumigationem (nominative fumigatio) "a smoking," noun of action from past participle stem of fumigare "to smoke," from fumus "smoke, fume" (see fume) + root of agere "to drive" (see act (n.)). Sense of "exposure (of someone or something) to aromatic fumes" is c.1400, originally as a medicinal or therapeutic treatment.
fun (n.) Look up fun at Dictionary.com
"diversion, amusement," 1727, earlier "a cheat, trick" (c.1700), from verb fun (1680s) "to cheat, hoax," of uncertain origin, probably a variant of Middle English fonnen "befool" (c.1400; see fond).

Stigmatized by Johnson as "a low cant word." Older sense is preserved in phrase to make fun of (1737) and funny money "counterfeit bills" (1938, though this may be more for the sake of the rhyme). See also funny.
funambulist (n.) Look up funambulist at Dictionary.com
"rope-walker," 1793, coined from Latin funis "rope" + ambulare "to walk" (see amble (v.)).
function (n.) Look up function at Dictionary.com
1530s, "proper work or purpose," from Middle French fonction (16c.) and directly from Latin functionem (nominative functio) "performance, execution," noun of action from functus, past participle of fungi "perform, execute, discharge," from PIE root *bheug- (2) "to use, enjoy" (see brook (v.)). Use in mathematics probably begun by Leibnitz (1692).
function (v.) Look up function at Dictionary.com
1856, from function (n.). Related: Functioned; functioning.
functional (adj.) Look up functional at Dictionary.com
1630s; as a term in architecture, "utilitarian," 1928; see function (n.) + -al (1). Related: Functionally; functionality.
functionalism (n.) Look up functionalism at Dictionary.com
1914 as a term in social sciences; 1930 in architecture; from functional + -ism. Related: functionalist.
functionary (n.) Look up functionary at Dictionary.com
"one who has a certain function," 1791, from or patterned on French fonctionnaire, a word of the Revolution; from Old French function (see function).
fund (n.) Look up fund at Dictionary.com
1660s, from French fond "a bottom, floor, ground" (12c.), also "a merchant's basic stock or capital," from Latin fundus "bottom, foundation, piece of land," from PIE root *bhudh- "bottom, base" (cognates: Sanskrit budhnah, Greek pythmen "foundation, bottom," Old English botm "lowest part;" see bottom (n.)). Funds "money at one's disposal" is from 1728. Fund-raiser (also fundraiser) first attested 1957.
fund (v.) Look up fund at Dictionary.com
1776, from fund (n.). Related: Funded; funding.
fundament (n.) Look up fundament at Dictionary.com
late 13c., "buttocks, anus," from Old French fondement "foundation, bottom; anus" (12c.), from Latin fundamentum "a foundation," from fundare "to found" (see bottom). So called because it is where one sits.
Alle þe filþ of his magh ['maw'] salle breste out atte his fondament for drede. ["Cursor Mundi," early 14c.]
fundamental (adj.) Look up fundamental at Dictionary.com
mid-15c., "primary, original, pertaining to a foundation," modeled on Late Latin fundamentalis "of the foundation," from Latin fundamentum "foundation" (see fundament). Fundamentals "primary principles or rules" of anything is from 1630s.
fundamentalist (adj.) Look up fundamentalist at Dictionary.com
1920 in the religious sense (as is fundamentalism), from fundamental + -ist. Coined in American English to name a movement among Protestants c.1920-25 based on scriptural inerrancy, etc., and associated with William Jennings Bryan, among others.

Fundamentalist is said (by George McCready Price) to have been first used in print by Curtis Lee Laws (1868-1946), editor of "The Watchman Examiner," a Baptist newspaper. The movement may have roots in the Presbyterian General Assembly of 1910, which drew up a list of five defining qualities of "true believers" which other evangelicals published in a mass-circulation series of books called "The Fundamentals." A World's Christian Fundamentals Association was founded in 1918. The words reached widespread use in the wake of the contentious Northern Baptist Convention of 1922 in Indianapolis.
Fundamentalism is a protest against that rationalistic interpretation of Christianity which seeks to discredit supernaturalism. This rationalism, when full grown, scorns the miracles of the Old Testament, sets aside the virgin birth of our Lord as a thing unbelievable, laughs at the credulity of those who accept many of the New Testament miracles, reduces the resurrection of our Lord to the fact that death did not end his existence, and sweeps away the promises of his second coming as an idle dream. It matters not by what name these modernists are known. The simple fact is that, in robbing Christianity of its supernatural content, they are undermining the very foundations of our holy religion. They boast that they are strengthening the foundations and making Christianity more rational and more acceptable to thoughtful people. Christianity is rooted and grounded in supernaturalism, and when robbed of supernaturalism it ceases to be a religion and becomes an exalted system of ethics. [Laws, "Herald & Presbyter," July 19, 1922]
The original opposition to fundamentalist (within the denominations) was modernist.
A new word has been coined into our vocabulary -- two new words -- 'Fundamentalist' and 'Fundamentalism.' They are not in the dictionaries as yet -- unless in the very latest editions. But they are on everyone's tongue. [Address Delivered at the Opening of the Seminary, Sept. 20, 1922, by Professor Harry Lathrop Reed, "Auburn Seminary Record"]
Applied to other religions, especially Islam, since 1957.
fundamentally (adv.) Look up fundamentally at Dictionary.com
c.1600, from fundamental + -ly (2).
fundus (n.) Look up fundus at Dictionary.com
from Latin fundus "bottom" (see fund (n.)).
funeral (n.) Look up funeral at Dictionary.com
mid-15c., from Middle French funérailles (plural) "funeral rites" (15c.), from Medieval Latin funeralia "funeral rites," originally neuter plural of Late Latin funeralis "having to do with a funeral," from Latin funus (genitive funeris) "funeral, funeral procession, burial rites; death, corpse," origin unknown, perhaps ultimately from PIE root *dheu- (3) "to die." Singular and plural used interchangeably in English until c.1700.
funerary (adj.) Look up funerary at Dictionary.com
1690s, from Late Latin funerarius, from funer-, root of funus (see funeral (n.)).
funereal (adj.) Look up funereal at Dictionary.com
1725, from funeral by influence of Middle French funerail, from Latin funereus "of a funeral," from funus "funeral; death."
funest (adj.) Look up funest at Dictionary.com
"portending death," 1550s (implied in funestal), from Middle French funeste "unlucky" (14c.), from Latin funestus "causing death, destructive; mournful," from funus (see funeral (n.)).
fungal (adj.) Look up fungal at Dictionary.com
1835, from Modern Latin fungalis, from fungus (see fungus).
fungi (n.) Look up fungi at Dictionary.com
Latin plural of fungus.
fungible (adj.) Look up fungible at Dictionary.com
"capable of being used in place of another," 1818, a word in law originally, from Medieval Latin fungibilis, from Latin fungi "perform," as in fungi vice "to take the place" (see function). Earlier as a noun (1765).
fungicide (n.) Look up fungicide at Dictionary.com
1889; see fungus + -cide.
fungo (n.) Look up fungo at Dictionary.com
1867, baseball slang, perhaps from dialectal fonge "catch," a relic of Old English fon "seize" (see fang), or possibly from the German cognate fangen. Not in OED 2nd ed. (1989).
fungous (adj.) Look up fungous at Dictionary.com
"spongy," early 15c., from Latin fungosus, from fungus (see fungus).
fungus (n.) Look up fungus at Dictionary.com
1520s, from Latin fungus "a mushroom," in English as a learned alternative to mushroom. (Funge was used in this sense late 14c.) The Latin word is believed to be cognate with (or derived from) Greek sphongos, the Attic form of spongos "sponge" (see sponge).
funicular (adj.) Look up funicular at Dictionary.com
1660s, from Latin funiculus, diminutive of funis "a cord, rope."
funk (n.1) Look up funk at Dictionary.com
"depression, ill-humor," 1743, probably originally Scottish and northern English; earlier as a verb, "panic, fail through panic," (1737), said to be 17c. Oxford University slang, perhaps from Flemish fonck "perturbation, agitation, distress," possibly related to Old French funicle "wild, mad."
funk (n.2) Look up funk at Dictionary.com
"bad smell," 1620s, from dialectal French funkière "smoke," from Old French fungier "give off smoke; fill with smoke," from Latin fumigare "to smoke" (see fume (n.)). In reference to a style of music, it is first attested 1959, a back-formation from funky.
funky (adj.) Look up funky at Dictionary.com
1784, "old, musty," in reference to cheeses, then "repulsive," from funk (n.2) + -y (2). It began to develop an approving sense in jazz slang c.1900, probably on the notion of "earthy, strong, deeply felt." Funky also was used early 20c. by white writers in reference to body odor allegedly peculiar to blacks. The word reached wider popularity c.1954 (it was defined in "Time" magazine, Nov. 8, 1954) and in the 1960s acquired a broad slang sense of "fine, stylish, excellent."