Etymology
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November 
c. 1200, from Old French novembre and directly from Latin November (also Novembris (mensis)), from novem "nine" (see nine). The ninth month of the Roman calendar, which began in March. For -ber see December. In Old English, it was Blotmonað "month of sacrifice," literally "blood-month," the time when the early Saxons prepared for winter by sacrificing animals, which they then butchered and stored for food.
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cretonne (n.)

"cotton cloth with various textures of surface," 1863 (Godey's, in the November edition, where it is presented as a new material, "of French make, and resembling alpaca"), from French cretonne (1723), supposedly from Creton, village in Normandy where it originally was made.

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radiant (n.)

in optics, "point or object from which light radiates," 1714; see radiant (adj.). In astronomy, of meteor showers, "the point in the heavens from which the shooting stars seem to proceed," by 1834, in reference to the great shower of the previous November.

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unfriend (v.)
in the Facebook sense, attested from November 2007, from un- (1) "not" + friend (v.). Unfriended is at least as old as Shakespeare in the sense "friendless." A noun unfriend "enemy" is recorded from late 13c., chiefly in Scottish, and was still in use in the 19th century.
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Samhain (n.)

"ancient Celtic festival celebrated on the first of November," 1888, from Irish samhain (Gaelic samhuinn), from Old Irish samain, literally "summer's end," from Old Irish sam "summer" (see summer (n.1)) + fuin "end." It marked the start of winter and of the new year.

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midwinter (n.)

also mid-winter, "the middle or depth of winter," Old English midwinter, also midde winter; see mid (adj.) + winter (n.). The middle of winter, traditionally the period around the winter solstice (Dec. 21, winter being reckoned from the first of November). As an adjective from mid-12c.

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flophouse (n.)

"cheap hotel," hobo slang, 1904, probably related to slang flop (v.) "lie down for sleep" (1907); see flop (v.) + house (n.). The explanation below is not found in other early references.

In one of [Cincinnati's] slum districts stands the Silver Moon, a "flop house" (i.e., a house where the occupants are "flopped" out of their hanging bunks by letting down the ropes) .... [McClure's magazine, November 1904]
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flow (n.)

mid-15c., "action of flowing," from flow (v.). Meaning "amount that flows" is from 1807. Sense of "any strong, progressive movement comparable to the flow of a river" is from 1640s. Flow chart attested from 1920 (flow-sheet in same sense from 1912). To go with the flow is by 1977, apparently originally in skiing jargon.

Go with the flow, enjoy the forces, let ankles, knees, hips and waist move subtly to soak up potential disturbances of acceleration and deceleration. [Ski magazine, November 1980]
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condom (n.)

"contraceptive sheath," 1706, traditionally named for a British physician during reign of Charles II (a story traceable to 1709), but there is no evidence for that. Also spelled condam, quondam, which suggests it may be from Italian guantone, from guanto "a glove." A word omitted in the original OED (c. 1890) and not used openly in the U.S. and not advertised in mass media until the November 1986 speech by Surgeon General C. Everett Koop on AIDS prevention. Compare prophylactic.

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werewolf (n.)
late Old English werewulf "person with the power to turn into a wolf," from wer "man, male person" (from PIE root *wi-ro- "man") + wulf (see wolf (n.); also see here for a short discussion of the mythology). Belief in them was widespread in the Middle Ages. Similar formation in Middle Dutch weerwolf, Old High German werwolf, Swedish varulf. In the ancient Persian calendar, the eighth month (October-November) was Varkazana-, literally "(Month of the) Wolf-Men."
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