encyclopediayoudaoicibaDictYouDict[encyclopedia 词源字典]
encyclopedia: [16] Etymologically, encyclopedia means ‘general education’. It is a medieval formation, based on the Greek phrase egkúklios paideíā (egkúklios, a compound adjective formed from the prefix en- ‘in’ and kúklos ‘circle’ – source of English cycle – meant originally ‘circular’, and hence ‘general’, and is the ultimate source of English encyclical [17]; paideíā ‘education’ was a derivative of país ‘boy, child’, which has given English paederast [18], paedophilia [20], pedagogue [14], pedant [16], and paediatrician [20]).

This referred to the general course of education which it was customary to give a child in classical Greece, and after it was merged into a single word egkuklopaideíā and transmitted via medieval Latin encyclopedia into English, it retained that meaning at first. However, in the 17th century the term began to be applied to compendious reference works (the first, or at least the one which did most to establish the name, was perhaps that of J H Alsted in 1632).

The Encyclopedia Britannica was first published in 1768.

=> cycle, encyclical, paederast, pedagogue, pedant, pediatrician[encyclopedia etymology, encyclopedia origin, 英语词源]
expeditionyoudaoicibaDictYouDict
expedition: [15] The Latin verb expedīre originally had the rather mundane meaning ‘free one’s feet’ – from a snare, for example It was formed from the prefix ex- ‘out’ and pēs ‘foot’ (source of English pedal, pedestrian, etc and related to English foot). Its literal meaning was soon lost sight of, progressing via ‘extricate, liberate’ to ‘bring out, make ready’ and ‘put in order, arrange, set right’.

The notion of ‘freeing’ something, enabling it to go forward without hindrance, is reflected in the verb’s English descendant expedite [17]. It also survives in the derived noun expedition, as ‘promptness, dispatch’; in the main, however, this has taken a different semantic route, via ‘sending out a military force’ to ‘long organized journey for a particular purpose’.

=> expedite, foot, pedal, pedestrian
impedeyoudaoicibaDictYouDict
impede: see pedal
pedagogueyoudaoicibaDictYouDict
pedagogue: see page
pedalyoudaoicibaDictYouDict
pedal: [17] Pedal is one of a group of English words which go back to Latin pēs ‘foot’ or its Romance descendants (to which English foot is related). Others include impede [17], pedestal [16] (which comes via French from Old Italian piedestallo, a conflation of pie di stallo ‘foot of a stall’), pedestrian [18], pedicure [19], pedigree, and pedometer [18].
=> foot, impede, pawn, pedestal, pedestrian, pedigree
pederastyoudaoicibaDictYouDict
pederast: see page
pedigreeyoudaoicibaDictYouDict
pedigree: [15] Etymologically, pedigree means ‘crane’s-foot’. It comes from Anglo-Norman *pe de gru, pe meaning ‘foot’ (from Latin pēs) and gru ‘crane’ (from Latin grūs). The notion behind the metaphor is that a bird’s foot, with its three splayed-out toes, resembles the branching lines drawn to illustrate a family tree.
=> crane, geranium
pedimentyoudaoicibaDictYouDict
pediment: see pyramid
pedometeryoudaoicibaDictYouDict
pedometer: see pedal
sesquipedalianyoudaoicibaDictYouDict
sesquipedalian: [17] Sesquipedalian means etymologically ‘a foot and a half long’. Its use in English was inspired by the Roman poet Horace’s phrase sesquipedalia verba, literally ‘words a foot and a half long’, hence ‘preposterously long words that sound pompous’ – of which sesquipedalian itself is an appropriately good example. It is a compound word formed from the Latin prefix sesqui- ‘half as much again’ (a derivative of sēmi- ‘half’) and pēs ‘foot’.
=> foot, pedal
biped (n.)youdaoicibaDictYouDict
"animal with two feet," 1640s, from Latin bipedem (nominative bipes) "two-footed," as a plural noun, "men;" from bi- "two" (see bi-) + pedem (nominative pes) "foot," from PIE root *ped- (1) "a foot" (see foot (n.)).
bipedal (adj.)youdaoicibaDictYouDict
c. 1600, from biped + -al (1). Classical Latin bipedalis meant "two feet long or thick."
bipedalism (n.)youdaoicibaDictYouDict
1897; see bipedal + -ism.
centipede (n.)youdaoicibaDictYouDict
1640s, from French centipède, from Latin centipeda "many-footed insect," from centum "hundred" (see hundred) + pedis, genitive of pes "foot," from PIE root *ped- (1) "a foot" (see foot (n.)).
cheliped (n.)youdaoicibaDictYouDict
1859, Modern Latin, from chela "claw," from Greek khele "claw" (see chelicerae) + Latin pod-, stem of pes "foot," from PIE root *ped- (1) "a foot" (see foot (n.)).
comped (adj.)youdaoicibaDictYouDict
"given or admitted free," 1960s, see comp.
encyclopedia (n.)youdaoicibaDictYouDict
1530s, "general course of instruction," from Modern Latin encyclopaedia (c. 1500), thought to be a false reading by Latin authors of Greek enkyklios paideia taken as "general education," but literally "training in a circle," i.e. the "circle" of arts and sciences, the essentials of a liberal education; from enkyklios "circular," also "general" (from en "in;" see in + kyklos "circle;" see cycle (n.)) + paideia "education, child-rearing," from pais (genitive paidos) "child" (see pedo-).

Modern sense of "reference work arranged alphabetically" is from 1640s, often applied specifically to the French "Encyclopédie ou Dictionnaire raisonné des Sciences, des Arts, et des Métiers" (1751-65). Related: Encyclopedist.
encyclopedic (adj.)youdaoicibaDictYouDict
1816, from encyclopedia + -ic.
expediate (v.)youdaoicibaDictYouDict
a 17c. error for expedite that has gotten into the dictionaries.
expedience (n.)youdaoicibaDictYouDict
mid-15c., "advantage, benefit," from Old French expedience, from Late Latin expedientia, from expedientem (see expedient). From "that which is expedient," the sense tends toward "utilitarian wisdom." Meaning "quality of being expedient" is from 1610s. Related: Expediency (1610s).
expedient (adj.)youdaoicibaDictYouDict
late 14c., "advantageous, fit, proper to a purpose," from Old French expedient "useful, beneficial" (14c.) or directly from Latin expedientem (nominative expediens) "beneficial," present participle of expedire "make fit or ready, prepare" (see expedite). The noun meaning "a device adopted in an exigency, that which serves to advance a desired result" is from 1650s. Related: Expediential; expedientially (both 19c.).
Expedient, contrivance, and device indicate artificial means of escape from difficulty or embarrassment; resource indicates natural means or something possessed; resort and shift may indicate either. [Century Dictionary]
expediently (adv.)youdaoicibaDictYouDict
late 14c., from expedient (adj.) + -ly (2).
expedite (v.)youdaoicibaDictYouDict
c. 1500 (implied in past participle expedit "accomplished"), from Latin expeditus, past participle of expedire "extricate, disengage, liberate; procure, make ready, put in order, make fit, prepare; explain, make clear," literally "free the feet from fetters," hence to liberate from difficulties, from ex- "out" (see ex-) + *pedis "fetter, chain for the feet," related to pes (genitive pedis) "foot," from PIE root *ped- (1) "a foot" (see foot (n.)). Compare Greek pede "fetter." Related: Expedited; expediting.
expedition (n.)youdaoicibaDictYouDict
early 15c., "military campaign; the act of rapidly setting forth," from Old French expedicion "an expediting, implementation; expedition, mission" (13c.) and directly from Latin expeditionem (nominative expeditio) "an enterprise against an enemy, a military campaign," noun of action from past participle stem of expedire "make ready, prepare" (see expedite). Meaning "journey for some purpose" is from 1590s. Sense by 1690s also included the body of persons on such a journey.
expeditionary (adj.)youdaoicibaDictYouDict
1803, from expedition + -ary.
expeditious (adj.)youdaoicibaDictYouDict
late 15c., expedycius "useful, fitting," from Latin expeditus "disengaged, ready, convenient, prompt; unfettered, unencumbered," past participle of expedire (see expedite). Meaning "speedy, speedily accomplished" is from 1590s. Related: Expeditiously; expeditiousness.
handicapped (adj.)youdaoicibaDictYouDict
"disabled," 1915, past participle adjective from handicap (v.). Originally especially of children. Meaning "handicapped persons generally" is attested by 1958.
hipped (adj.)youdaoicibaDictYouDict
"having hips," c. 1500, past participle adjective; see hip (n.1)). In architecture from 1823.
hopped (adj.)youdaoicibaDictYouDict
a word that seems to merge three senses of hop; the meaning "flavored with hops" (hop (n.1)) is first attested 1660s; that of "under the influence of drugs" (hop (n.2)) is from 1924; that of "excited, enthusiastic" (perhaps from hop (v.)) is from 1923. Meaning "performance-enhanced" (of an engine, etc.) is from 1945.
hypnopedia (n.)youdaoicibaDictYouDict
also hypnopaedia, "sleep-learning," 1932, from Greek hypnos "sleep" (see somnolence) + paideia "education" (see pedo-).
impedance (n.)youdaoicibaDictYouDict
1886, from impede + -ance.
impede (v.)youdaoicibaDictYouDict
c. 1600, back-formation from impediment, or else from Latin impedire "impede, be in the way, hinder, detain," literally "to shackle the feet" (see impediment). Related: Impeded; impedes; impeding.
impediment (n.)youdaoicibaDictYouDict
c. 1400, from Latin impedimentem "hindrance," from impedire "impede," literally "to shackle the feet," from assimilated form of in- "into, in" (see in- (2)) + pes (genitive pedis) "foot," from PIE root *ped- (1) "a foot" (see foot (n.)).
impedimenta (n.)youdaoicibaDictYouDict
"traveling equipment," c. 1600, from Latin impedimenta "luggage, baggage," literally "that by which one is impeded;" plural of impedimentum (see impediment).
inexpedient (adj.)youdaoicibaDictYouDict
c. 1600, from in- (1) "not, opposite of" + expedient. Related: Inexpedience; inexpediently.
millipede (n.)youdaoicibaDictYouDict
also millepede, c. 1600, from Latin millepeda "wood louse," a type of crawling insect, from mille "thousand" (see million) + pes (genitive pedis) "foot," from PIE root *ped- (1) "a foot" (see foot (n.)). Probably a loan-translation of Greek chiliopous.
moped (n.)youdaoicibaDictYouDict
1956, from Swedish (c. 1952), from (trampcykel med) mo(tor och) ped(aler) "pedal cycle with engine and pedals" (the earliest versions had auxiliary pedals). Compare obsolete English mo-bike (1925), from motor bicycle.
orthopedic (adj.)youdaoicibaDictYouDict
1840, from French orthopédique, from orthopédie, coined by French physician Nicholas Andry (1658-1742), from Greek orthos "straight, correct" (see ortho-) + paideia "rearing of children," from pais (genitive paidos) "child" (see pedo-).
orthopedics (n.)youdaoicibaDictYouDict
1853, from orthopedic. Also see -ics.
orthopedist (n.)youdaoicibaDictYouDict
1853, from orthopedy (1840), from French orthopédie (18c.); see orthopedic + -ist.
pedagogic (adj.)youdaoicibaDictYouDict
1781, from Latin paedagogicus, from Greek paidagogikos "suitable for a teacher," from paidagogos "teacher" (see pedagogue).
pedagogical (adj.)youdaoicibaDictYouDict
1610s, from Latin paedagogicus (see pedagogic) + -al (1). Related: Pedagogically.
pedagogue (n.)youdaoicibaDictYouDict
late 14c., "schoolmaster, teacher," from Old French pedagoge "teacher of children" (14c.), from Latin paedagogus, from Greek paidagogos "slave who escorts boys to school and generally supervises them," later "a teacher," from pais (genitive paidos) "child" (see pedo-) + agogos "leader," from agein "to lead" (see act (n.)). Hostile implications in the word are at least from the time of Pepys (1650s). Related: Pedagogal.
pedagogy (n.)youdaoicibaDictYouDict
1580s, from Middle French pédagogie (16c.), from Latin paedagogia, from Greek paidagogia "education, attendance on boys," from paidagogos "teacher" (see pedagogue).
pedal (n.)youdaoicibaDictYouDict
1610s, "lever (on an organ) worked by foot," from French pédale "feet, trick with the feet," from Italian pedale "treadle, pedal," from Late Latin pedale "(thing) of the foot," neuter of Latin pedalis "of the foot," from pes (genitive pedis) "foot," from PIE root *ped- (1) "a foot" (see foot (n.)).

Extended to various mechanical contrivances by 1789. Pedal steel guitar is from 1969. Pedal-pushers "type of women's trousers suitable for bicycling" is from 1944.
When college girls took to riding bicycles in slacks, they first rolled up one trouser leg, then rolled up both. This whimsy has now produced a trim variety of long shorts, called "pedal pushers." ["Life," Aug. 28, 1944]
pedal (v.)youdaoicibaDictYouDict
1866 of musical organs, 1888 of bicycles, from pedal (n.). Related: Pedaled; pedaling.
pedant (n.)youdaoicibaDictYouDict
1580s, "schoolmaster," from Middle French pédant (1560s) or directly from Italian pedante, literally "teacher, schoolmaster," of uncertain origin, apparently an alteration of Late Latin paedagogantem (nominative paedagogans), present participle of paedagogare (see pedagogue). Meaning "person who trumpets minor points of learning" first recorded 1590s.
pedantic (adj.)youdaoicibaDictYouDict
formed in English c. 1600, from pedant + -ic. The French equivalent is pédantesque. Perhaps first attested in John Donne's "Sunne Rising," where he bids the morning sun let his love and him linger in bed, telling it, "Sawcy pedantique wretch, goe chide Late schooleboyes." Related: Pedantical (1580s); pedantically.
pedanticism (n.)youdaoicibaDictYouDict
19c., from pedantic + -ism. Earlier was pedantism (1590s).
pedantocracy (n.)youdaoicibaDictYouDict
1842, from pedant + -cracy. Coined (in French) by Mill in a letter to Comte.