feeble (adj.) Look up feeble at Dictionary.com
late 12c., from Old French feble (12c., Modern French faible) "weak, feeble," from Latin flebilis "lamentable," literally "that is to be wept over," from flere "weep, cry, shed tears, lament," from PIE *bhle- "to howl" (see bleat). The first -l- was dropped in Old French by dissimilation. The noun meaning "feeble person" is recorded from mid-14c.
feebleminded (adj.) Look up feebleminded at Dictionary.com
1530s; see feeble + mind. Related: Feeblemindedness.
feebleness (n.) Look up feebleness at Dictionary.com
c.1300, from feeble + -ness.
feebly (adv.) Look up feebly at Dictionary.com
late 13c., from feeble + -ly (2).
feed (v.) Look up feed at Dictionary.com
Old English fedan "nourish, feed, sustain, foster," from Proto-Germanic *fodjan (cognates: Old Saxon fodjan, Old Frisian feda, Dutch voeden, Old High German fuotan, Old Norse foeða, Gothic fodjan "to feed"), from PIE *pa- "to protect, feed" (see food). Feeding frenzy is from 1989, metaphoric extension of a phrase that had been used of sharks since 1950s.
feed (n.) Look up feed at Dictionary.com
"action of feeding," 1570s, from feed (v.). Meaning "food for animals" is first attested 1580s. Of machinery, from 1892.
feedback (n.) Look up feedback at Dictionary.com
1920, in the electronics sense, from feed + back (adj.). Transferred use, "information about the results of a process" is attested by 1955.
feeder (n.) Look up feeder at Dictionary.com
early 15c., "one who feeds an animal;" 1560s, "one who eats;" agent noun from feed. As a mechanical apparatus, from 1660s. Of cattle and streams, by 1790s; of roads and railroads, by 1850s.
feel (v.) Look up feel at Dictionary.com
Old English felan "to touch, perceive," from Proto-Germanic *foljan (cognates: Old Saxon gifolian, Old Frisian fela, Dutch voelen, Old High German vuolen, German fühlen "to feel," Old Norse falma "to grope"), from PIE root *pal- "to touch, feel, shake, strike softly" (cognates: Greek psallein "to pluck (the harp)," Latin palpare "to touch softly, stroke," palpitare "to move quickly"), perhaps ultimately imitative.

The sense in Old English was "to perceive through senses which are not referred to any special organ." Sense of "be conscious of a sensation or emotion" developed by late 13c.; that of "to have sympathy or compassion" is from c.1600. To feel like "want to" attested from 1829.
feel (n.) Look up feel at Dictionary.com
early 13c., "sensation, understanding," from feel (v.). Meaning "action of feeling" is from mid-15c. "Sensation produced by something" is from 1739. Noun sense of "sexual grope" is from 1932; from verbal phrase to feel (someone) up (1930).
feeler (n.) Look up feeler at Dictionary.com
early 15c., "one who feels," agent noun from feel (v.). Of animal organs, 1660s. Transferred sense of "proposal put forth to observe the reaction it gets" is from 1830. Related: Feelers.
feeling (n.) Look up feeling at Dictionary.com
late 12c., "act of touching, sense of touch," verbal noun from feel (v.). Meaning "emotion" is mid-14c. Meaning "what one feels (about something), opinion" is from mid-15c. Meaning "capacity to feel" is from 1580s. Related: Feelingly.
feelings (n.) Look up feelings at Dictionary.com
"tender or sensitive side of one's nature," 1771, from plural of feeling.
feet (n.) Look up feet at Dictionary.com
plural of foot (n.).
feign (v.) Look up feign at Dictionary.com
c.1300, from Old French feign-, present participle stem of feindre "pretend, represent, imitate, shirk" (12c.), from Latin fingere "to touch, handle; devise; fabricate, alter, change" (see fiction). Related: Feigned; feigning.
feint (n.) Look up feint at Dictionary.com
1670s, "a false show, a pretended blow," from French feinte "a feint, sham," abstract noun from Old French feint (13c.) "false, deceitful," originally fem. past participle of feindre (see feign).

Borrowed late 13c. as adjective, but now obsolete in that sense. Also as a noun in Middle English with sense "false-heartedness" (early 14c.), also "bodily weakness" (c.1400).
feint (v.) Look up feint at Dictionary.com
c.1300, feinten, "to deceive, pretend," also "become feeble or exhausted; to lack spirit or courage," from feint (adj.); see feint (n.). Compare Old French feintir "be slow, delay." Sense of "to make a sham attack" is first attested 1833. Related: Feinted; feinting.
feist (n.) Look up feist at Dictionary.com
also fist, "a breaking wind, foul smell, fart," mid-15c. (Old English had present participle fisting), a general West Germanic word with cognates in Middle Dutch veest, Dutch vijst (see feisty).
feisty (adj.) Look up feisty at Dictionary.com
1896, "aggressive, exuberant, touchy," American English, with -y (2) + feist "small dog," earlier fice, fist (American English, 1805); short for fysting curre "stinking cur," attested from 1520s, from Middle English fysten, fisten "break wind" (mid-15c.); related to Old English fisting "stink," from Proto-Germanic *fistiz- "a fart," said to be from PIE *pezd- (see fart), but there are difficulties.

The 1811 slang dictionary defines fice as "a small windy escape backwards, more obvious to the nose than ears; frequently by old ladies charged on their lap-dogs." Compare also Danish fise "to blow, to fart," and obsolete English aske-fise, "fire-tender," literally "ash-blower" (early 15c.), from an unrecorded Norse source, used in Middle English for a kind of bellows, but originally "a term of reproach among northern nations for an unwarlike fellow who stayed at home in the chimney corner" [OED].
feldspar (n.) Look up feldspar at Dictionary.com
1785, earlier feldspath (1757), from older German Feldspath (Modern German Feldspat), from Feld "field" (see field (n.)) + spath "spar, non-metallic mineral, gypsum" (see spar (n.2)); spelling influenced by English spar "mineral."
Felicia Look up Felicia at Dictionary.com
fem. proper name, from Latin felix (genitive felicis) "happy" (see felicity).
felicide (n.) Look up felicide at Dictionary.com
"killing of a cat," 1832, from Latin feles "cat" (see feline) + -cide.
felicitate (v.) Look up felicitate at Dictionary.com
1620s, "to render happy;" 1630s, "to reckon happy;" from Latin felicitatus, past participle of felicitare "to make happy," from felicitas "fruitfulness, happiness," from felix (see felicity). Meaning "congratulate" is from 1630s. Related: Felicitated; felicitating.
felicitation (n.) Look up felicitation at Dictionary.com
1709, noun of action from felicitate. Related: Felicitations.
felicitous (adj.) Look up felicitous at Dictionary.com
1530s (implied in felicitously), from felicity + -ous.
felicity (n.) Look up felicity at Dictionary.com
late 14c., from Old French felicite (14c.) "happiness," from Latin felicitatem (nominative felicitas) "happiness, fertility," from felix (genitive felicis) "happy, fortunate, fruitful, fertile," from Latin root *fe-, equivalent of PIE *dhe(i)- "to suck, suckle, produce, yield" (see fecund).
feline (adj.) Look up feline at Dictionary.com
1680s, from Late Latin felinus "of or belonging to a cat," from Latin feles (genitive felis) "cat, wild cat, marten," of uncertain origin. As a noun, from 1861.
Felix Look up Felix at Dictionary.com
masc. proper name, from Latin felix "happy" (see felicity).
fell (v.1) Look up fell at Dictionary.com
Old English fællan (Mercian), fyllan (West Saxon) "make fall, cause to fall," also "strike down, demolish, kill," from Proto-Germanic *falljan "strike down, cause to fall" (cognates: Old Frisian falla, Old Saxon fellian, Dutch fellen, Old High German fellen, German fällen, Old Norse fella, Danish fælde), causative of *fallan (source of Old English feallan, see fall (v.)), showing i-mutation. Related: Felled; feller; felling.
fell (adj.) Look up fell at Dictionary.com
"cruel," late 13c., from Old French fel "cruel, fierce, vicious," from Medieval Latin fello "villain" (see felon). Phrase at one fell swoop is from "Macbeth."
fell (n.1) Look up fell at Dictionary.com
"rocky hill," c.1300, from Old Norse fiall "mountain," from Proto-Germanic *felzam- "rock" (cognates: German Fels "stone, rock"), from PIE root *pel(i)s- "rock, cliff."
fell (v.2) Look up fell at Dictionary.com
Old English feoll; past tense of fall (v.).
fell (n.2) Look up fell at Dictionary.com
"skin or hide of an animal," Old English fel, from Proto-Germanic *felnam- (cognates: Old Frisian fel, Old Saxon fel, Dutch vel, Old High German fel, German fell, Old Norse fiall, Gothic fill), from PIE *pel-no-, suffixed form of root *pel- (4) "skin, hide" (see film (n.)).
fella (n.) Look up fella at Dictionary.com
attempt at phonetic spelling of a casual pronunciation of fellow, attested by 1864. Feller, along the same lines, is recorded by 1825.
fellah (n.) Look up fellah at Dictionary.com
"Egyptian peasant," 1743, from Arabic fallah "plowman," from falaha "to till the soil."
fellahin (n.) Look up fellahin at Dictionary.com
1743, plural of Arabic fallah (see fellah).
fellate (v.) Look up fellate at Dictionary.com
1968, verbal derivative of fellatio. Related: Fellated; fellating.
fellatio (n.) Look up fellatio at Dictionary.com
1887, from Latin fellatus, past participle of fellare "to suck," from PIE root *dhe(i)- (see fecund). The sexual partner performing fellatio is a fellator; if female, a fellatrice or fellatrix.
fellation (n.) Look up fellation at Dictionary.com
1888, from fellatio + -ion.
felloe (n.) Look up felloe at Dictionary.com
"rim of a spoked wheel," early 15c., from felie (c.1200), from Old English felga, plural of felg "rim of a wheel," from Proto-Germanic *felz- (cognates: Old Saxon felga, Middle Dutch velge, Dutch velg, Old High German felga, German Felge).
fellow (n.) Look up fellow at Dictionary.com
c.1200, from Old English feolaga "fellow, partner," from Old Norse felagi, from fe "money" (see fee) + verbal base denoting "lay" (see lay (v.)). Sense is of "one who puts down money with another in a joint venture." Used familiarly since mid-15c. for "man, male person," but not etymologically masculine.

University senses (mid-15c.), corresponding to Latin socius) evolved from notion of "one of the corporation who constitute a college" and who are paid from its revenues. First record of fellow-traveler in sense of "one who sympathizes with the Communist movement but is not a party member," is from 1936, translating Russian poputchik. The literal sense is attested in English from 1610s.
fellow-feeling (n.) Look up fellow-feeling at Dictionary.com
1610s, an attempt to translate Latin compassio and Greek sympatheia. It yielded a back-formed verb, fellow-feel in 17c.
fellowship (n.) Look up fellowship at Dictionary.com
c.1200, feolahschipe "companionship," from fellow + -ship. In Middle English it was at times a euphemism for "sexual intercourse" (carnal fellowship).
To fellowship with is to hold communion with; to unite with in doctrine and discipline. This barbarism now appears with disgusting frequency in the reports of ecclesiastical conventions, and in the religious newspapers generally. [Bartlett, "Dictionary of Americanisms," 1848]
felo-de-se (n.) Look up felo-de-se at Dictionary.com
Latin, "suicide," literally "one guilty concerning himself."
felon (n.) Look up felon at Dictionary.com
late 13c., from Old French felon "evil-doer, scoundrel, traitor, rebel, the Devil" (9c.), from Medieval Latin fellonem (nominative fello) "evil-doer," of uncertain origin, perhaps from Frankish *fillo, *filljo "person who whips or beats, scourger" (source of Old High German fillen "to whip"); or from Latin fel "gall, poison," on the notion of "one full of bitterness."

Another theory (advanced by Professor R. Atkinson of Dublin) traces it to Latin fellare "to suck" (see fecund), which had an obscene secondary meaning in classical Latin (well-known to readers of Martial and Catullus), which would make a felon etymologically a "cock-sucker." OED inclines toward the "gall" explanation, but finds Atkinson's "most plausible" of the others.
felonious (adj.) Look up felonious at Dictionary.com
mid-15c. (implied in feloniously), from felony + -ous. Replaced felonous (mid-14c.) by c.1600. Felonly (c.1300) was another variation.
felony (n.) Look up felony at Dictionary.com
late 13c. as a term in common law, in Anglo-French, from Old French felonie (12c.) "wickedness, evil, treachery, perfidy, crime, cruelty, sin," from Gallo-Roman *fellonia, from fellonem (see felon).
felsic (adj.) Look up felsic at Dictionary.com
1912, from feldspar + silica + -ic.
felt (n.) Look up felt at Dictionary.com
Old English felt, from West Germanic *feltaz "something beaten, compressed wool" (cognates: Old Saxon filt, Middle Dutch vilt, Old High German filz, German Filz, Danish filt), from Proto-Germanic *felt- "to beat," from PIE *pel- (6) "to thrust, strike, drive" (source also of Old Church Slavonic plusti), with a sense of "beating" (see pulse (n.1)).
felt (v.1) Look up felt at Dictionary.com
"to make into felt," early 14c. (implied in felted); see felt (n.).