nope (adv.)youdaoicibaDictYouDict[nope 词源字典]
1888, emphatic form of no, with emphasis on the closing of the lips.[nope etymology, nope origin, 英语词源]
nor (conj.)youdaoicibaDictYouDict
c. 1300, contraction of Middle English nauther (see neither). Influenced in form by or.
NorayoudaoicibaDictYouDict
fem. proper name, Irish, shortened from Honora or Leonora.
Nordic (adj.)youdaoicibaDictYouDict
1898, from French nordique (in J. Deniker's system of race classifications), literally "of or pertaining to the north," from nord "north" (a loan-word from Old English; see north). Perhaps influenced by German Nordisch. As a noun, from 1901. Strictly, the blond peoples who inhabit Scandinavia and the north of Britain. As a type of skiing competition, it is attested from 1954.
norepinephrine (n.)youdaoicibaDictYouDict
1868, from normal (in reference to molecular structure) + epinephrine.
NorfolkyoudaoicibaDictYouDict
Nordfolc (1066) "(Territory of the) Northern People (of the East Angles)." The Norfolk pine (1778), used as an ornamental tree, is from Norfolk Island in the South Pacific, northwest of New Zealand.
norm (n.)youdaoicibaDictYouDict
"standard, pattern, model," 1821, from French norme, from Latin norma "carpenter's square, rule, pattern," of unknown origin. Klein suggests a borrowing (via Etruscan) of Greek gnomon "carpenter's square." The Latin form of the word, norma, was used in English in the sense of "carpenter's square" from 1670s.
NormayoudaoicibaDictYouDict
fem. proper name, probably from Latin norma (see norm).
normal (adj.)youdaoicibaDictYouDict
c. 1500, "typical, common;" 1640s, "standing at a right angle," from Late Latin normalis "in conformity with rule, normal," from Latin normalis "made according to a carpenter's square," from norma "rule, pattern," literally "carpenter's square" (see norm). Meaning "conforming to common standards, usual" is from 1828, but probably older than the record [Barnhart].

As a noun meaning "usual state or condition," from 1890. Sense of "normal person or thing" is from 1894. Normal school (1834) is from French école normale (1794), a republican foundation. The city of Normal, Illinois, U.S., was named 1857 for the normal school established there.
normalcy (n.)youdaoicibaDictYouDict
1857, "mathematical condition of being at right angles," from normal + -cy. Associated since c. 1920 with U.S. president Warren G. Harding and derided as an example of his incompetent speaking style. Previously used mostly in the mathematical sense. The word prefered by purists for "a normal situation" is normality (1849).
normality (n.)youdaoicibaDictYouDict
1849, from normal + -ity. Perhaps influenced by French normalité (1834).
normalization (n.)youdaoicibaDictYouDict
1882, from normalize + -ation. International political sense recorded from 1938.
normalize (v.)youdaoicibaDictYouDict
1865, from normal + -ize. Related: Normalized; normalizing.
normally (adv.)youdaoicibaDictYouDict
1590s, "regularly," from normal + -ly (2). Meaning "under ordinary conditions" is from 1853.
Norman (n.)youdaoicibaDictYouDict
c. 1200, "one of the mixed Scandinavian-Frankish people who conquered England in 1066," from Old French Normanz, plural of Normand, Normant, literally "North man," from a Scandinavian word meaning "northman" (see Norse), in reference to the Scandinavian people who overran and occupied Normandy 10c. Later meaning "one of the Norman French who conquered England in 1066." As an adjective from 1580s. As a style of architecture, developed in Normandy and employed in England after the conquest, it is attested from 1797. Norseman (1817) is not historical and appears to be due to Scott.
NormandyyoudaoicibaDictYouDict
literally "region settled by Vikings;" from Normand (see Norman).
normative (adj.)youdaoicibaDictYouDict
1880, perhaps from French normatif, from Latin norma "rule" (see normal).
Norn (n.)youdaoicibaDictYouDict
1770, from Old Norse norn (plural nornir), one of the female fates of Scandinavian mythology, related to Swedish dialectal norna "to warn, to communicate secretly," perhaps ultimately imitative of low murmuring (compare Middle High German narren "to growl, snarl").
Norse (n.)youdaoicibaDictYouDict
1590s, "a Norwegian," from obsolete Dutch Noorsch (adj.) "Norwegian," from noordsch "northern, nordic," from noord "north" (see north). Also in some cases borrowed from cognate Danish or Norwegian norsk. As a language, from 1680s. Old Norse attested from 1844. An Old English word for "a Norwegian" was Norðman. As an adjective from 1768.

In Old French, Norois as a noun meant "a Norse, Norseman," also "action worth of a man from the North (i.e. usually considered as deceitful)" [Hindley, et. al.]; as an adjective it meant "northern, Norse, Norwegian," also "proud, fierce, fiery, strong."
northyoudaoicibaDictYouDict
Old English norð "northern" (adj.), "northwards" (adv.), from Proto-Germanic *nurtha- (cognates: Old Norse norðr, Old Saxon north, Old Frisian north, Middle Dutch nort, Dutch noord, German nord), possibly ultimately from PIE *ner- (1) "left," also "below," as north is to the left when one faces the rising sun (cognates: Sanskrit narakah "hell," Greek enerthen "from beneath," Oscan-Umbrian nertrak "left"). The same notion underlies Old Irish tuath "left; northern;" Arabic shamal "left hand; north." The usual word for "north" in the Romance languages ultimately is from English, for example Old French north (Modern French nord), borrowed from Old English norð; Italian, Spanish norte are borrowed from French.
Ask where's the North? At York 'tis on the Tweed;
In Scotland at the Orcades; and there
At Greenland, Zembla, or the Lord knows where.
[Pope, "Essay on Man"]
As a noun, c. 1200, from the adverb. North Pole attested from mid-15c. (earlier the Arctic pole, late 14c.). North American (n.) first used 1766, by Franklin; as an adjective, from 1770.