briefyoudaoicibaDictYouDict[brief 词源字典]
brief: [14] Brief comes via Old French bref from Latin brevis ‘short’, which is probably related to Greek brakhús ‘short’, from which English gets the combining form brachy-, as in brachycephalic. Latin produced the nominal derivative breve ‘letter’, later ‘summary’, which came into English in the 14th century in the sense ‘letter of authority’ (German has brief simply meaning ‘letter’).

The notion of an ‘abbreviation’ or ‘summary’ followed in the next century, and the modern legal sense ‘summary of the facts of a case’ developed in the 17th century. This formed the basis of the verbal sense ‘inform and instruct’, which is 19th-century. Briefs ‘underpants’ are 20th-century. The musical use of the noun breve began in the 15th century when, logically enough, it meant ‘short note’.

Modern usage, in which it denotes the longest note, comes from Italian breve. Other derivatives of brief include brevity [16], introduced into English via Anglo-Norman brevete; abbreviate [15], from late Latin abbreviāre (which is also the source, via Old French abregier, of abridge [14]); and breviary ‘book of church services’ [16], from Latin breviārium.

=> abbreviate, abridge, brevity[brief etymology, brief origin, 英语词源]
everyoudaoicibaDictYouDict
ever: [OE] For such a common and longestablished word, the origins of ever are surprisingly obscure. It has no relatives in other Germanic languages, so it must be a purely English creation. Its first element probably comes from Germanic *aiwō (which is also represented in English aye ‘ever’ [12] and either, and is related to Latin aevum ‘age’, source of English eternal).

The second element is a puzzle, though. Candidates that have been put forward include Old English feorh ‘life’ (thus, ‘ever in life’) and Old English byre ‘occasion’ (giving the underlying sense ‘on any occasion’). Never was formed in the Old English period with the negative particle ne.

=> aye, either, eternal
seatyoudaoicibaDictYouDict
seat: [12] Seat is of course a close relative of sit – they come from the same prehistoric Germanic base, *set-. But unlike sit, it is not a longestablished native word. It is a borrowing, from Old Norse sáeti. It originally meant ‘act of sitting’, and was not used for ‘something to sit on’ until the 13th century.
=> sit
antidisestablishmentarianism (n.)youdaoicibaDictYouDict
"opposition to disestablishment of the Church of England," 1838, said by Weekley to be first recorded in Gladstone's "Church and State," from dis- + establishment in the sense of "the ecclesiastical system established by law; the Church of England" (1731). Hence establishmentarianism "the principle of a state church" (1846) and disestablish (1590s) "to deprive (a church) of especial state patronage and support" (first used specifically of Christian churches in 1806), which are married in this word. Rarely used at all now except in examples of the longest words, amongst which it has been counted at least since 1901.
BarnabasyoudaoicibaDictYouDict
surname of Joseph the Levite of Cyprus (Acts iv:36), literally "son of exhortation," from Aramaic bar "son" + nabha "prophecy, exhortation." St. Barnabas' Day (colloquially St. Barnaby), June 11, in the Old Style calendar was reckoned the longest day of the year.
cognizance (n.)youdaoicibaDictYouDict
mid-14c., from Anglo-French conysance "recognition," later, "knowledge," from Old French conoissance "acquaintance, recognition; knowledge, wisdom" (Modern French connaissance), from past participle of conoistre "to know," from Latin cognoscere "to get to know, recognize," from com- "together" (see co-) + gnoscere "to know" (see notice (n.)). The -g- was restored in English spelling 15c. and has gradually affected the pronunciation, which was always "con-." The old pronunciation lingered longest in legal use.
fidget (n.)youdaoicibaDictYouDict
1670s, as the fidget "uneasiness," later the fidgets, from a verb fidge "move restlessly" (16c., surviving longest in Scottish), perhaps from Middle English fiken "to fidget, hasten" (see fike (v.)).
gaol (n.)youdaoicibaDictYouDict
see jail (n.), you tea-sodden football hooligan. Formerly in official use in Britain, and thus sometimes regarded in U.S. as a characteristic British spelling (though George Washington used it); by the time of OED 2nd edition (1980s) both spellings were considered correct there; the g- spelling is said to have been dominant longest in Australia.
[T]he very anomalous pronunciation of g soft before other vowels than e, i, & y ... is a strong argument for writing jail [Fowler]
hundred (n.)youdaoicibaDictYouDict
Old English hundred "the number of 100, a counting of 100," from Proto-Germanic *hundrath (cognates: Old Norse hundrað, German hundert); first element is Proto-Germanic *hundam "hundred" (cognate with Gothic hund, Old High German hunt), from PIE *km-tom "hundred," reduced from *dkm-tom- (cognates: Sanskrit satam, Avestan satem, Greek hekaton, Latin centum, Lithuanian simtas, Old Church Slavonic suto, Old Irish cet, Breton kant "hundred"), from *dekm- "ten" (see ten).

Second element is Proto-Germanic *rath "reckoning, number" (as in Gothic raþjo "a reckoning, account, number," garaþjan "to count;" see read (v.)). The common word for the number in Old English was simple hund, and Old English also used hund-teontig.
In Old Norse hundrath meant 120, that is the long hundred of six score, and at a later date, when both the six-score hundred and the five-score hundred were in use, the old or long hundred was styled hundrath tolf-roett ... meaning "duodecimal hundred," and the new or short hundred was called hundrath ti-rætt, meaning "decimal hundred." "The Long Hundred and its use in England" was discussed by Mr W.H. Stevenson, in 1889, in the Archcæological Review (iv. 313-27), where he stated that amongst the Teutons, who longest preserved their native customs unimpaired by the influence of Latin Christianity, the hundred was generally the six-score hundred. The short hundred was introduced among the Northmen in the train of Christianity. ["Transactions" of the Lancashire and Cheshire Antiquarian Society, 1907]
Meaning "division of a county or shire with its own court" (still in some British place names and U.S. state of Delaware) was in Old English and probably represents 100 hides of land. The Hundred Years War (which ran intermittently from 1337 to 1453) was first so called in 1874. The original Hundred Days was the period between Napoleon's restoration and his final abdication in 1815.