front (n.) Look up front at Dictionary.com
late 13c., "forehead," from Old French front "forehead, brow" (12c.), from Latin frontem (nominative frons) "forehead, brow, front; facade, forepart; appearance," perhaps literally "that which projects," from PIE *bhront-, from root *bhren- "to project, stand out." Or from PIE *ser- (4), "base of prepositions and preverbs with the basic meaning 'above, over, up, upper'" [Watkins, not in Pokorny].

Sense of "foremost part of anything" developed in Latin. The military sense of "foremost part of an army" (mid-14c.) led to the meaning "field of operations in contact with the enemy" (1660s). Home front is from 1919. Sense of "public facade" is from 1891; that of "something serving as a cover for illegal activities" is from 1905. Meteorological sense first recorded 1921. Front yard first attested 1767.
front (v.) Look up front at Dictionary.com
1520s, from Middle French fronter, from Old French front (see front (n.)). Related: Fronted; fronting.
frontage (n.) Look up frontage at Dictionary.com
1620s, from front (n.) + -age.
frontal (adj.) Look up frontal at Dictionary.com
1650s, of the forehead; 1971 with reference to the naked body; from Modern Latin frontalis, from front-, stem of frons "brow, forehead" (see front). Or in some cases probably from front (n.) + adjectival suffix -al (1).
frontier (n.) Look up frontier at Dictionary.com
c.1400, from Old French frontier "prow of a ship, front rank of an army" (13c.), noun use of adjective frontier "facing, neighboring," from front "brow" (see front (n.)).

Originally the front line of an army, sense of "borderland" is first attested early 15c. In reference to North America, from 1670s; later with a specific sense:
What is the frontier? ... In the census reports it is treated as the margin of that settlement which has a density of two or more to the square mile. [F.J. Turner, "The Frontier in American History," 1920]
Frontiersman is from 1782.
frontispiece (n.) Look up frontispiece at Dictionary.com
1590s, "decorated entrance of a building," from Middle French frontispice, probably from Italian frontespizio and Late Latin frontispicium "facade," originally "a view of the forehead, judgment of character through facial features," from Latin frons (genitive frontis) "forehead" (see front (n.)) + specere "to look at" (see scope (n.1)). Sense of "illustration facing a book's title page" first recorded 1680s. The spelling alteration is apparently from confusion with piece.
frontlet (n.) Look up frontlet at Dictionary.com
from Old French frontelet, diminutive of frontel (Modern French fronteau) "forehead, front of a helmet, hairband," from Late Latin frontale "an ornament for the forehead," from frons (see front (n.)).
frontline Look up frontline at Dictionary.com
also front-line, 1899 (n.), 1915 (adj.), from front (adj.) + line (n.).
frontrunner (n.) Look up frontrunner at Dictionary.com
also front-runner, of political candidates, 1908, American English, a metaphor from horse racing (where it is used by 1903 of a horse that runs best while in the lead).
frore (adj.) Look up frore at Dictionary.com
"frosty, frozen," archaic (but found in poetry as late as Keats), from Old English froren, past participle of freosan (see freeze (v.)).
frosh (n.) Look up frosh at Dictionary.com
student colloquial shortening and alteration of freshman, attested by 1915, "perh. under influence of German frosch frog, (dial.) grammar-school pupil" [OED].
frost (n.) Look up frost at Dictionary.com
Old English forst, frost "a freezing, becoming frozen, extreme cold," from Proto-Germanic *frusta- (cognates: Old Saxon, Old Frisian, Old High German frost, Middle Dutch and Dutch vorst), related to freosan "to freeze," from PIE *preus- "to freeze; burn" (see freeze (v.)). Both forms of the word were common in English till late 15c.; the triumph of frost may be due to its similarity to the forms in other Germanic languages.
frost (v.) Look up frost at Dictionary.com
1630s, from frost (n.). Related: Frosted; frosting.
frostbite (n.) Look up frostbite at Dictionary.com
also frost-bite, 1813, from frost (n.) + bite (n.).
frostbitten (adj.) Look up frostbitten at Dictionary.com
also frost-bitten, 1550s, from frost (n.) + bitten.
frosted (adj.) Look up frosted at Dictionary.com
1640s of whitening hair; 1680s of glass; 1734 of sugar or icing, past participle adjective from frost.
frosting (n.) Look up frosting at Dictionary.com
1610s as an action; 1756 as a substance; meaning "cake icing" is from 1858; verbal noun from frost (v.).
frosty (adj.) Look up frosty at Dictionary.com
Old English forstig, fyrstig (cognates: Dutch vorstig, German frostig); see frost (n.) + -y (2). Figurative use from late 14c. Related: Frostily; frostiness.
froth (n.) Look up froth at Dictionary.com
c.1300, from an unrecorded Old English word, or else from Old Norse froða "froth," from Proto-Germanic *freuth-. Old English had afreoðan "to froth," from the same root. The modern derived verb is from late 14c. Related: Frothed; frothing.
frothy (adj.) Look up frothy at Dictionary.com
1530s, from froth + -y (2). Related: Frothiness.
frottage (n.) Look up frottage at Dictionary.com
1933, from French frottage "rubbing, friction," from frotter "to rub," from Old French froter "to rub, wipe; beat, thrash" (12c.), from Latin fricare "to rub" (see friction). As a paraphilia, it is known as frotteurism.
frou-frou Look up frou-frou at Dictionary.com
1870, "a rustling," from French (19c.), possibly imitative of the rustling of a dress. Meaning "fussy details" is from 1876.
frounce (v.) Look up frounce at Dictionary.com
c.1300, "to gather in folds," from Old French froncier, from fronce (n.), of unknown origin. Related: Frounced; frouncing.
frow (n.) Look up frow at Dictionary.com
"Dutchwoman," late 14c., from Middle Dutch vrouwe (Dutch vrow), cognate with German Frau (see frau).
froward (adv.) Look up froward at Dictionary.com
Old English fromweard "turned from or away," from from + -weard (see -ward). Opposite of toward, it renders Latin pervertus in early translations of the Psalms, and also meant "about to depart, departing," and "doomed to die." Related: Frowardly; frowardness.
frown (v.) Look up frown at Dictionary.com
late 14c., from Old French frognier "to frown or scowl, snort, turn one's nose up," related to froigne "scowling look," probably from Gaulish *frogna "nostril" (compare Welsh ffroen "nose"), with a sense of "snort," or perhaps "haughty grimace." Related: Frowned; frowning.
frown (n.) Look up frown at Dictionary.com
1580s, from frown (v.).
frowsty (adj.) Look up frowsty at Dictionary.com
"having an unpleasant smell," 1865, of unknown origin; perhaps related to Old French frouste "ruinous, decayed," or to Old English þroh "rancid;" both of which also are of uncertain origin.
frowzy (adj.) Look up frowzy at Dictionary.com
also frowsy, 1680s, possibly related to dialectal frowsty (q.v.).
frozen (adj.) Look up frozen at Dictionary.com
mid-14c., past participle adjective from freeze (v.). Figurative use is from 1570s. Of assets, bank accounts, etc., from 1922.
fructify (v.) Look up fructify at Dictionary.com
early 14c., from Old French fructifiier (12c.) "bear fruit, grow, develop," from Late Latin fructificare "bear fruit," from Latin fructus (see fruit) + root of facere "make" (see factitious). Related: Fructified; fructifying.
fructose (n.) Look up fructose at Dictionary.com
sugar found in fruit, 1857, coined in English from Latin fructus (see fruit) + chemical suffix -ose.
frug (n.) Look up frug at Dictionary.com
1964, popular U.S. dance derived from the Twist, of unknown origin.
frugal (adj.) Look up frugal at Dictionary.com
1590s, from Middle French frugal, from Latin frugalis, from undeclined adj. frugi "useful, proper, worthy, honest; temperate, economical," originally dative of frux (plural fruges) "fruit, produce," figuratively "value, result, success," related to fructus (see fruit). Sense evolved in Latin from "useful" to "profitable" to "economical." Related: Frugally.
frugality (n.) Look up frugality at Dictionary.com
1530s, from Middle French frugalité (14c.), from Latin frugalitatem (nominative frugalitas) "thriftiness, temperance, frugality," from frugalis (see frugal).
frugivorous (adj.) Look up frugivorous at Dictionary.com
from Latin frugi-, stem of frux "fruit, produce," related to fructus (see fruit) + -vorous.
fruit (n.) Look up fruit at Dictionary.com
late 12c., from Old French fruit "fruit, fruit eaten as dessert; harvest; virtuous action" (12c.), from Latin fructus "an enjoyment, delight, satisfaction; proceeds, produce, fruit, crops," from frug-, stem of frui "to use, enjoy," from PIE *bhrug- "agricultural produce," also "to enjoy" (see brook (v.)).

Classical sense preserved in fruits of one's labor. Originally in English meaning vegetables as well. Modern narrower sense is from early 13c. Meaning "odd person, eccentric" is from 1910; that of "male homosexual" is from 1935. The term also is noted in 1931 as tramp slang for "a girl or woman willing to oblige," probably from the fact of being "easy picking." Fruit salad recorded from 1861.
fruitcake (n.) Look up fruitcake at Dictionary.com
1838 in the literal sense, from fruit + cake (n.). Slang meaning "lunatic person" is first attested 1952.
fruitful (adj.) Look up fruitful at Dictionary.com
c.1300, of trees, from fruit + -ful. Related: Fruitfully; fruitfulness. Of animals or persons from early 16c.; of immaterial things from 1530s.
fruition (n.) Look up fruition at Dictionary.com
early 15c., "act of enjoying," from Middle French fruition and directly from Late Latin fruitionem (nominative fruitio) "enjoyment," noun of action from Latin frui "to use, enjoy." Sense of "act or state of bearing fruit" is first recorded 1885 by mistaken association with fruit; figurative sense is from 1889.
fruitless (adj.) Look up fruitless at Dictionary.com
mid-14c., "unprofitable," from fruit + -less. Meaning "barren, sterile" is from 1510s. Related: Fruitlessly.
fruity (adj.) Look up fruity at Dictionary.com
1650s, from fruit + -y (2). Related: Fruitiness.
frumbierding (n.) Look up frumbierding at Dictionary.com
an excellent Old English word meaning "a youth;" from fruma "first, beginning" + beard + -ling.
frumious (adj.) Look up frumious at Dictionary.com
1871, coined by Lewis Carroll, who said it was a blend of fuming and furious. He used it in both "Jabberwocky" and "The Hunting of the Snark" (1876).
frump (n.) Look up frump at Dictionary.com
"cross, unstylish person" 1817, perhaps from frumple (v.) "to wrinkle" (late 14c.), from Middle Dutch verrompelen "to wrinkle" (see frumpy).
frumpy (adj.) Look up frumpy at Dictionary.com
1746, "cross-tempered," from frump (n.) "bad temper" (1660s) and an earlier verb meaning "to mock, browbeat" (1550s), of obscure origin, perhaps imitative of a sneer or derisive snort. Sense of "sour-looking, unfashionable" is from 1825, but this may be a shortening of frumple "to wrinkle, crumple" (late 14c.), from Middle Dutch verrompelen, from ver- "completely" + rompelen "to rumple." Related: Frumps. See also frump.
frustrate (v.) Look up frustrate at Dictionary.com
mid-15c., from Latin frustratus, past participle of frustrari "to deceive, disappoint, frustrate," from frustra (adv.) "in vain, in error," related to fraus "injury, harm" (see fraud). Related: Frustrated; frustrating.
frustrated (adj.) Look up frustrated at Dictionary.com
"disappointed," 1640s, past participle adjective from frustrate.
frustration (n.) Look up frustration at Dictionary.com
"act of frustrating," 1550s, from Latin frustrationem (nominative frustratio) "a deception, a disappointment," noun of action from past participle stem of frustrari (see frustrate). Earlier (mid-15c.) with a sense of "nullification."
frustum (n.) Look up frustum at Dictionary.com
1650s, from Latin frustum "piece broken off," from PIE *bhrus-to-, from root *bhreu- "to cut, break up" (see bruise (v.)).