coin (n.) Look up coin at Dictionary.com
c. 1300, "a wedge," from Old French coing (12c.) "a wedge; stamp; piece of money; corner, angle," from Latin cuneus "a wedge." The die for stamping metal was wedge-shaped, and the English word came to mean "thing stamped, a piece of money" by late 14c. (a sense that already had developed in French). Compare quoin, which split off from this word 16c. Modern French coin is "corner, angle, nook." Coins were first struck in western Asia Minor in 7c. B.C.E.; Greek tradition and Herodotus credit the Lydians with being first to make and use coins of silver and gold.
coinage (n.) Look up coinage at Dictionary.com
late 14c., "currency, money," from Old French coignage, from coignier "to coin" (see coin (n.)). Meaning "act or process of coining money" is from early 15c.; sense "deliberate formation of a new word" is from 1690s, from a general sense of "something invented" (c. 1600).
coincide (v.) Look up coincide at Dictionary.com
1705, "be identical in substance or nature," but from 1640s as a verb in English in Latin form, "occupy the same space, agree in position," from Medieval Latin coincidere (used in astrology), literally "to fall upon together," from Latin com "with, together" (see com-) + incidere "to fall upon" (from in- "upon" + combining form of cadere "to fall," from PIE root *kad- "to fall"). From 1809 as "occur at the same time." Related: Coincided; coinciding.
coincidence (n.) Look up coincidence at Dictionary.com
c. 1600, "exact correspondence in substance or nature," from French coincidence, from coincider, from Medieval Latin coincidere (see coincide). From 1640s as "occurrence or existence during the same time." Meaning "a concurrence of events with no apparent connection" is from 1680s, perhaps first in writings of Sir Thomas Browne.
coincident (adj.) Look up coincident at Dictionary.com
late 16c., from French coincident, from coincider (see coincide).
coincidental (adj.) Look up coincidental at Dictionary.com
c. 1800, from coincident + -al (1).
coincidentally (adv.) Look up coincidentally at Dictionary.com
1837, from coincidental + -ly (2).
coincidently Look up coincidently at Dictionary.com
1620s, from coincident + -ly (2).
Cointreau (n.) Look up Cointreau at Dictionary.com
orange-flavored liqueur, named for founders Adolphe and Edouard-Jean Cointreau, brothers from Angers, France, who set up Cointreau Distillery in 1849. The orange liqueur dates from 1875.
coir (n.) Look up coir at Dictionary.com
"prepared coconut fiber," 1580s, from Malayalam (Dravidian) kayar "cord," from kayaru "to be twisted."
coit (n.) Look up coit at Dictionary.com
"coition," early 15c., from Latin coitus "going together," also "coition," from coire "to go together" (see coitus).
coition (n.) Look up coition at Dictionary.com
1540s, "going together, coming together," from Late Latin coitionem (nominative coitio), noun of action from coitus, past participle of coire "to go together, come together" (see coitus). Meaning "sexual copulation" is attested in English from 1610s.
coitus (n.) Look up coitus at Dictionary.com
"copulation," 1713, scientific Latin, from Latin coitus "a meeting together; sexual union," past participle of coire, from com- "together" (see co-) + ire (past participle itus) "come, go," (from PIE root *ei- "to go"). In Middle English as coite (early 15c.). Used in English in general senses of "meeting, uniting," and also of magnetic force, planetary conjunction, etc., before sexual sense came to predominate.
coitus interruptus (n.) Look up coitus interruptus at Dictionary.com
1900, first attested in Havelock Ellis.
cojones (n.) Look up cojones at Dictionary.com
"courage," literally "balls," 1932, from Spanish cojon "testicle," from Latin coleus, culleus (source of Italian coglione), literally "a leather sack," related to Greek koleos "sheath, scabbard," from PIE root *kel- (1) "to cover, conceal, save." In English, first attested in Hemingway.
coke (n.1) Look up coke at Dictionary.com
"residue of fuel," 1690s, northern English dialect, perhaps a variant of Middle English colke "core, charcoal" (c. 1400), itself possibly related to -colc, an Old English word for "pit," which perhaps would give it a sense of "what is left in the pit after a fire."
Coke Look up Coke at Dictionary.com
soft drink, 1909, shortening of brand name Coca-Cola.
coke (n.2) Look up coke at Dictionary.com
shortened form of cocaine, 1908, American English.
col- Look up col- at Dictionary.com
form of Latin com- "with, together" before stems beginning in -l- (see com-).
cola (n.) Look up cola at Dictionary.com
1795, genus of trees native to west Africa and introduced in New World tropics, Latinized form of a West African name of the tree (compare Temne kola, Mandingo kolo). Meaning "carbonated soft drink" is 1920, short for Coca-Cola, Pepsi-Cola.
colander (n.) Look up colander at Dictionary.com
mid-14c., coloundour, probably altered from Medieval Latin colatorium "strainer" (with parasitic -n-) from Latin colatus, past participle of colare "to strain," from colum "sieve, strainer, wicker fishing net," which is of uncertain origin. Cognate with French couloir, Spanish colador, Italian colatojo.
cold (adj.) Look up cold at Dictionary.com
Old English cald (Anglian), ceald (West Saxon) "cold, cool" (adj.), "coldness," from Proto-Germanic *kaldaz (source also of Old Frisian and Old Saxon kald, Old High German and German kalt, Old Norse kaldr, Gothic kalds "cold"), possibly a past participle adjective of *kal-/*kol-, from PIE root *gel-/*gol- "cold" (source also of Latin gelare "to freeze," gelu "frost," glacies "ice").

Meaning "not strong" (in reference to scent) is 1590s, from hunting. Cold front in weather is from 1921. Cold-call in the sales pitch sense first recorded 1972. Japanese has two words for "cold:" samui for coldness in the atmosphere or environment; tsumetai for things which are cold to touch, and also in the figurative sense, with reference to personalities, behaviors, etc.
cold (n.) Look up cold at Dictionary.com
c. 1300, "coldness," from cold (adj.). Sense in common cold is 1530s, from symptoms resembling those of exposure to cold; compare earlier senses "indisposition caused by exposure to cold" (early 14c.); "discomfort caused by cold" (c. 1300).
cold feet (n.) Look up cold feet at Dictionary.com
1893, American English; the presumed Italian original (avegh minga frecc i pee) is a Lombard proverb meaning "to have no money," but some of the earliest English usages refer to gamblers, so a connection is possible.
cold shoulder (n.) Look up cold shoulder at Dictionary.com
1816, in the figurative sense of "icy reception," first in Sir Walter Scott, probably originally a literal figure, but commonly used with a punning reference to "cold shoulder of mutton," considered a poor man's dish and thus, perhaps, something one would set out for an unwanted guest with deliberate intention to convey displeasure.
How often have we admired the poor knight, who, to avoid the snares of bribery and dependence, was found making a second dinner from a cold shoulder of mutton, above the most affluent courtier, who had sold himself to others for a splendid pension! ["No Fiction," 1820]
cold turkey Look up cold turkey at Dictionary.com
"without preparation," 1910; narrower sense of "withdrawal from an addictive substance" (originally heroin) first recorded 1921. Cold turkey is a food that requires little preparation, so "to quit like cold turkey" is to do so suddenly and without preparation. Compare cold shoulder.
cold war (n.) Look up cold war at Dictionary.com
"nonhostile belligerency," used in print October 1945 by George Orwell; popularized in U.S. c. 1947 by U.S. statesman Bernard Baruch (1870-1965). Hence hot war (1947).
More than any other time in history, mankind faces a crossroads. One path leads to despair and utter hopelessness. The other, to total extinction. Let us pray we have the wisdom to choose correctly. [Woody Allen, "My Speech to the Graduates," 1979]
cold-blooded (adj.) Look up cold-blooded at Dictionary.com
also cold blooded; 1590s, of persons, "without emotion, unfeeling;" of actions, from 1828. The phrase refers to the old notion that blood temperature rose with excitement. In the literal sense, of reptiles, etc., from c. 1600. From cold (adj.) + blood (n.). Related: Cold-bloodedly; cold-bloodedness.
cold-hearted (adj.) Look up cold-hearted at Dictionary.com
c. 1600, from cold (adj.) + -hearted. Originally in Shakespeare. Old English had cealdheort (adj.) "cruel."
cole (n.) Look up cole at Dictionary.com
"cabbage," late Old English cawel, perhaps via Old Norse kal, from Latin caulis "stem, stalk," which in Vulgar Latin replaced brassica as the usual word for "cabbage" (source also of Italian cavolo, Spanish col, Old French chol, French chou; also borrowed elsewhere in Germanic, for example Swedish kal, Danish kaal, German kohl, Dutch kool).
colectomy (n.) Look up colectomy at Dictionary.com
1882, from colon (n.2) + -ectomy.
coleoptera (n.) Look up coleoptera at Dictionary.com
1763, from Modern Latin, from Greek koleopteros, literally "sheath-wing," used by Aristotle to describe beetles, from koleos "sheath" (from PIE root *kel- (1) "to cover, conceal, save") + pteron "wing" (see ptero-). Related: Coleopterous.
coleslaw (n.) Look up coleslaw at Dictionary.com
also cole-slaw, cole slaw, 1794, American English, partial translation of Dutch koolsla, from kool "cabbage" (see cole) + sla "salad" (see slaw). Commonly cold slaw in English until 1860s, when Middle English cole "cabbage" was revived.
colic (n.) Look up colic at Dictionary.com
"disease characterized by severe abdominal pain," early 15c., from Late Latin colicus "pertaining to colic," from Greek kolikos, belonging to the kolon "lower intestine" (see colon (n.2)). The word was used in English late 14c. as an adjective, "affecting the colon." Related: Colicky (1742).
coliform (adj.) Look up coliform at Dictionary.com
1850s, "resembling a sieve," from Latin colum "strainer;" meaning "resembling a bacillus of the coli group" is from 1906, from coli + form.
Colin Look up Colin at Dictionary.com
masc. proper name, from French Colin, a diminutive of Col, itself a diminutive of Nicolas. A common shepherd's name in pastoral verse.
coliseum (n.) Look up coliseum at Dictionary.com
"music hall," c. 1710, Modern Latin variant of Latin colosseum, amphitheater of Vespasian at Rome (see Colosseum).
colitis (n.) Look up colitis at Dictionary.com
1860, from combining form of colon (n.2) + -itis "inflammation."
collaborate (v.) Look up collaborate at Dictionary.com
1871, back-formation from collaborator. Given a bad sense in World War II. Related: Collaborated; collaborating.
collaboration (n.) Look up collaboration at Dictionary.com
1860, from French collaboration, noun of action from Latin collaborare (see collaborate). In a bad sense, "tratorious cooperation with an occupying enemy," it is recorded from 1940; earliest references are to the Vichy Government of France.
collaborator (n.) Look up collaborator at Dictionary.com
1802, from French collaborateur, from Latin collaboratus, past participle of collaborare "work with," from com- "with" (see com-) + labore "to work" (see labor (v.)).
collage (n.) Look up collage at Dictionary.com
1919, from French collage "a pasting," from Old French coller "to glue," from Greek kolla "glue," a word of uncertain origin, perhaps Pre-Greek. Earliest reference is in Wyndham Lewis.
collagen (n.) Look up collagen at Dictionary.com
structural protein of connective tissue, 1843, from French collagène, from Greek kolla "glue" + -gen "giving birth to" (see -gen).
collapsable (adj.) Look up collapsable at Dictionary.com
1843, from collapse (v.) + -able.
collapse (n.) Look up collapse at Dictionary.com
1801, from collapse (v.).
collapse (v.) Look up collapse at Dictionary.com
1732, from Latin collapsus, past participle of collabi "fall together," from assimilated form of com "with, together" (see com-) + labi "to fall, slip" (see lapse (n.)). The adjective collapsed is attested from c. 1600, from Latin collapsus, and perhaps this suggested a verb. Related: Collapsing.
collapsible (adj.) Look up collapsible at Dictionary.com
1875, alternative spelling of collapsable.
collar (v.) Look up collar at Dictionary.com
1550s, "to grab (someone) by the collar or neck," from collar (n.). Meaning "to capture" is attested from 1610s. Related: Collared; collaring. As a past participle adjective, collared "wearing a collar" is from late 14c.
collar (n.) Look up collar at Dictionary.com
c. 1300, "neck armor, gorget," from Old French coler "neck, collar" (12c., Modern French collier), from Latin collare "necklace, band or chain for the neck," from collum "the neck," from PIE *kwol-o- "neck" (source also of Old Norse and Middle Dutch hals "neck"), literally "that on which the head turns," from root *kwel- (1) "revolve, move round." Late 14c. as "border at the neck of a garment."
collarbone (n.) Look up collarbone at Dictionary.com
c. 1500, from collar (n.) + bone (n.).