英语词源字典 - 在线词源网站

frothy (adj.)[frothy 词源字典]: 1530s, "full of foam," from froth + -y (2). Meaning "vain, light, insubstantial" is from 1590s. Related: Frothiness.[frothy etymology, frothy origin, 英语词源]
frottage (n.): 1933 as the name of a sexual perversion, from French frottage "rubbing, friction," from frotter "to rub," from Old French froter "to rub, wipe; beat, thrash" (12c.), from Vulgar Latin *frictare, frequentative of Latin fricare "to rub" (see friction). As a paraphilia, it is known now as frotteurism.
frou-frou (n.): 1870, "a rustling," from French (19c.), possibly imitative of the rustling of a dress. The word was popularized in English by a French play translated and given that name. Meaning "fussy details" is from 1876.
frounce (v.): c. 1300, "to gather in folds," from Old French froncir, froncier "to pleat, fold; purse; crease, wrinkle," from fronce (n.), which is of unknown origin. Perhaps it is somehow from Latin frons "forehead," on the notion of frowning. Related: Frounced; frouncing.
frow (n.): "Dutchwoman," late 14c., from Middle Dutch vrouwe (Dutch vrow), cognate with German Frau (see frau).
froward (adv.): 12c., froward, fraward "turned against, perverse, disobedient; peevish, petulant; adverse, difficult," as a preposition, "away from," the Northern form of Old English fromweard (see fromward), with Old Norse fra (see fro) in place of English from. 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.): "contract the brows as an expression of displeasure," late 14c., from Old French frognier "to frown or scowl, snort, turn up one's nose" (preserved in Modern French refrogner), related to froigne "scowling look," probably from Gaulish *frogna "nostril" (compare Welsh ffroen "nose"), with a sense of "snort," or perhaps "haughty grimace." Figurative transitive sense "look with displeasure" is from 1570s. Related: Frowned; frowning.
frown (n.): 1580s, from frown (v.).
frowsty (adj.): "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. Also compare frowzy.
frowzy (adj.): also frowsy, 1680s, possibly related to dialectal frowsty (q.v.).
frozen (adj.): mid-14c., "congealed by cold; turned to or covered with ice," past participle adjective from freeze (v.). Figurative use is from 1570s. Of assets, bank accounts, etc., from 1922.
fructify (v.): mid-14c., "bear fruit," from Old French fructifiier "bear fruit, grow, develop" (12c.), from Late Latin fructificare "bear fruit," from Latin fructus "fruit, crops; profit, enjoyment" (see fruit) + root of facere "to make, do" (see factitious). Transitive use from 1580s. Related: Fructified; fructifying; fructification.
fructose (n.): sugar found in fruit, 1857, coined in English from Latin fructus "fruit" (see fruit) + chemical suffix -ose (2).
frug (n.): popular U.S. dance derived from the Twist, 1964, of unknown origin.
frugal (adj.): "economical in use," 1590s, from Middle French frugal, from Latin frugalis, from undeclined adjective frugi "useful, proper, worthy, honest; temperate, economical," originally dative of frux (plural fruges) "fruit, produce," figuratively "value, result, success," related to fructus (see fruit), from PIE *bhrug- "agricultural produce," also "to enjoy." Sense evolved in Latin from "useful" to "profitable" to "economical." Related: Frugally.
frugality (n.): 1530s, "economy, thriftiness," from Middle French frugalité (14c.), from Latin frugalitatem (nominative frugalitas) "thriftiness, temperance, frugality," from frugalis (see frugal).
frugivorous (adj.): "feeding on fruits," 1833, from Latin frugi-, stem of frux "fruit, produce" (see frugal) + -vorous.
fruit (n.): late 12c., "any vegetable product useful to humans or animals," 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 suffixed form of PIE *bhrug- "agricultural produce," also "to enjoy" (see brook (v.)). The Latin word also is the source of Spanish fruto, Italian frutto, German Frucht, Swedish frukt-.

Originally in English meaning all products of the soil (vegetables, nuts, grain, acorns); modern narrower sense is from early 13c. Also "income from agricultural produce, revenue or profits from the soil" (mid-14c.), hence, "profit," the classical sense preserved in fruits of (one's) labor. Meaning "offspring, progeny, child" is from mid-13c.; that of "any consequence, outcome, or result" is from late 14c. Meaning "odd person, eccentric" is from 1910; that of "male homosexual" is from 1935, underworld slang. 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; fruit-cocktail from 1900; fruit-bat by 1869.
fruitcake (n.): also fruit-cake, 1838 in the literal sense "a rich, sweet cake containing fruit," from fruit + cake (n.). Slang meaning "lunatic person" is first attested 1952.
fruitful (adj.): c. 1300, of trees, from fruit + -ful. Related: Fruitfully; fruitfulness. Of animals or persons from early 16c.; of immaterial things from 1530s.