cunning (adj.)youdaoicibaDictYouDict[cunning 词源字典]
early 14c., "learned, skillful," present participle of cunnen "to know" (see can (v.1)). Sense of "skillfully deceitful" is probably late 14c. As a noun from c. 1300. Related: Cunningly.[cunning etymology, cunning origin, 英语词源]
cunt (n.)youdaoicibaDictYouDict
"female intercrural foramen," or, as some 18c. writers refer to it, "the monosyllable," Middle English cunte "female genitalia," by early 14c. (in Hendyng's "Proverbs" -- ʒeve þi cunte to cunni[n]g, And crave affetir wedding), akin to Old Norse kunta, Old Frisian, Middle Dutch, and Middle Low German kunte, from Proto-Germanic *kunton, which is of uncertain origin. Some suggest a link with Latin cuneus "wedge," others to PIE root *geu- "hollow place," still others to PIE *gwen-, root of queen and Greek gyne "woman."

The form is similar to Latin cunnus "female pudenda" (also, vulgarly, "a woman"), which is likewise of disputed origin, perhaps literally "gash, slit," from PIE *sker- (1) "to cut," or literally "sheath," from PIE *kut-no-, from root *(s)keu- "to conceal, hide."
Hec vulva: a cunt. Hic cunnus: idem est. [from Londesborough Illustrated Nominale, c. 1500, in "Anglo-Saxon and Old English Vocabularies," eds. Wright and Wülcker, vol. 1, 1884]
First known reference in English apparently is in a compound, Oxford street name Gropecuntlane cited from c. 1230 (and attested through late 14c.) in "Place-Names of Oxfordshire" (Gelling & Stenton, 1953), presumably a haunt of prostitutes. Used in medical writing c. 1400, but avoided in public speech since 15c.; considered obscene since 17c.

in Middle English also conte, counte, and sometimes queinte, queynte (for this, see q). Chaucer used quaint and queynte in "Canterbury Tales" (late 14c.), and Andrew Marvell might be punning on quaint in "To His Coy Mistress" (1650).
"What eyleth yow to grucche thus and grone? Is it for ye wolde haue my queynte allone?" [Wife of Bath's Tale]
Under "MONOSYLLABLE" Farmer lists 552 synonyms from English slang and literature before launching into another 5 pages of them in French, German, Italian, Spanish, and Portuguese. [A sampling: Botany Bay, chum, coffee-shop, cookie, End of the Sentimental Journey, fancy bit, Fumbler's Hall, funniment, goatmilker, heaven, hell, Itching Jenny, jelly-bag, Low Countries, nature's tufted treasure, parenthesis, penwiper, prick-skinner, seminary, tickle-toby, undeniable, wonderful lamp, and aphrodisaical tennis court, and, in a separate listing, Naggie. Dutch cognate de kont means "a bottom, an arse," but Dutch also has attractive poetic slang ways of expressing this part, such as liefdesgrot, literally "cave of love," and vleesroos "rose of flesh."

Alternative form cunny is attested from c. 1720 but is certainly much earlier and forced a change in the pronunciation of coney (q.v.), but it was good for a pun while coney was still the common word for "rabbit": "A pox upon your Christian cockatrices! They cry, like poulterers' wives, 'No money, no coney.' " [Philip Massinger: "The Virgin-Martyr," Act I, Scene 1, 1622]
cup (n.)youdaoicibaDictYouDict
Old English cuppe, from Late Latin cuppa "cup" (source of Italian coppa, Spanish copa, Old French coupe "cup"), from Latin cupa "tub, cask, tun, barrel," from PIE *keup- "a hollow" (cognates: Sanskrit kupah "hollow, pit, cave," Greek kype "a kind of ship," Old Church Slavonic kupu, Lithuanian kaupas).

The Late Latin word was borrowed throughout Germanic: Old Frisian kopp "cup, head," Middle Low German kopp "cup," Middle Dutch coppe, Dutch kopje "cup, head." German cognate Kopf now means exclusively "head" (compare French tête, from Latin testa "potsherd"). Meaning "part of a bra that holds a breast" is from 1938. [One's] cup of tea "what interests one" (1932), earlier used of persons (1908), the sense being "what is invigorating."
cup (v.)youdaoicibaDictYouDict
late 14c., "to draw blood by cupping," from cup (n.). Meaning "to form a cup" is from 1830. Related: Cupped; cupping.
cupboard (n.)youdaoicibaDictYouDict
late 14c., "a board or table to place cups and like objects," from cup (n.) + board (n.1). As a type of closed cabinet for food, etc., from early 16c.
cupcake (n.)youdaoicibaDictYouDict
1828, American English, from cup (n.) + cake (n.), probably from the cups they are baked in, but possibly from the small measures of ingredients used to make them. Meaning "attractive young woman" is recorded from 1930s, American English.
cupful (n.)youdaoicibaDictYouDict
mid-12c., from cup (n.) + -ful.
CupidyoudaoicibaDictYouDict
Roman god of passionate love, late 14c., from Latin Cupido, personification of cupido "desire, love," from cupere "to desire" (see cupidity). Identified with Greek Eros. Cupid's bow as a shape, especially of lips, is from 1858.
cupidity (n.)youdaoicibaDictYouDict
mid-15c., from Anglo-French cupidite, Middle French cupidité, from Latin cupiditatem (nominative cupiditas) "passionate desire, lust; ambition," from cupidus "eager, passionate," from cupere "to desire" (perhaps cognate with Sanskrit kupyati "bubbles up, becomes agitated," Old Church Slavonic kypeti "to boil," Lithuanian kupeti "to boil over"). Despite the primarily erotic sense of the Latin word, in English cupidity originally, and still especially, means "desire for wealth."
cupola (n.)youdaoicibaDictYouDict
1540s, from Italian cupola, from Late Latin cupula "a little tub," diminutive of Latin cupa "cask, barrel" (see cup (n.)).
cuppa (n.)youdaoicibaDictYouDict
colloquial shortening of cup of (coffee, etc.), recorded from 1925; as a stand-alone (almost always with implied tea) it dates from 1934.
cupreous (adj.)youdaoicibaDictYouDict
1660s, from Late Latin cupreus "of copper," from cuprum, alternative form of cyprum "copper" (see copper (n.1)). Related: Cupric (1799).
cur (n.)youdaoicibaDictYouDict
early 13c., curre, earlier kurdogge used of both vicious dogs and cowardly dogs, probably from Old Norse kurra or Middle Low German korren both echoic, both meaning "to growl." Compare Swedish dialectal kurre, Middle Dutch corre "house dog."
curable (adj.)youdaoicibaDictYouDict
late 14c., from cure (v.) + -able; or from Old French curable (13c.) and directly from Late Latin curabilis, from Latin curare.
CuracaoyoudaoicibaDictYouDict
West Indian island, Curaçao, discovered 1499 by Alonso de Hojeda, who called it Isla de los Gigantes in reference to the stature of the natives. The modern name probably is a Europeanized version of some lost native word. The liqueur is made from the dried peel of the Curaçao orange.
curare (n.)youdaoicibaDictYouDict
1777, from Portuguese or Spanish curare, a corruption of the name in the Carib language of the Macusi Indians of Guyana, wurali or wurari, which had a sort of click sound at the beginning, and is said to mean "he to whom it comes falls."
curate (n.)youdaoicibaDictYouDict
late 14c., "spiritual guide," from Medieval Latin curatus "one responsible for the care (of souls)," from Latin curatus, past participle of curare "to take care of" (see cure (v.)). Church of England sense of "paid deputy priest of a parish" first recorded 1550s.
curation (n.)youdaoicibaDictYouDict
late 14c., from Old French curacion "treatment of illness," from Latin curationem (nominative curatio), "a taking care, attention, management," especially "medical attention," noun of action from past participle stem of curare "to cure" (see cure (v.)).
curative (adj.)youdaoicibaDictYouDict
early 15c., from Old French curatif (15c.) "curative, healing," from Latin curat-, past participle stem of curare "to cure" (see cure (v.)). As a noun, attested from 1857.
curator (n.)youdaoicibaDictYouDict
mid-14c., from Latin curator "overseer, manager, guardian," agent noun from curatus, past participle of curare (see cure (v.)). Originally of those put in charge of minors, lunatics, etc.; meaning "officer in charge of a museum, library, etc." is from 1660s.