英语词源字典 - 在线词源网站

knowingly (adv.)[knowingly 词源字典]: late 14c., from knowing + -ly (2).[knowingly etymology, knowingly origin, 英语词源]
knowledge (n.): early 12c., cnawlece "acknowledgment of a superior, honor, worship;" for first element see know (v.). Second element obscure, perhaps from Scandinavian and cognate with the -lock "action, process," found in wedlock. Meaning "capacity for knowing, understanding; familiarity; fact of knowing" is late 14c. Sense of "an organized body of facts or teachings" is from c. 1400, as is that of "sexual intercourse." Also a verb in Middle English, knoulechen "acknowledge" (c. 1200), later "find out about; recognize," and "to have sexual intercourse with" (c. 1300).
knowledgeable (adj.): also knowledgable, c. 1600, "capable of being known, recognizable" (a sense now obsolete), from knowledge in its Middle English verbal sense + -able. The modern sense of "having knowledge, displaying knowledge" is from 1829 and probably a new formation.
known: past participle of know.
knub (n.): "small lump," 1560s, probably cognate with Low German knubbe "knot, knob," Danish knub "block, log, stump" (see knob).
knuckle (n.): mid-14c., knokel "finger joint; any joint of the body, especially a knobby one; morbid lump or swelling;" common Germanic (cognates: Middle Low German knökel, Middle Dutch cnockel, German knöchel), literally "little bone," a diminutive of Proto-Germanic root *knuk- "bone" (compare German Knochen "bone).

As a verb from 1740, originally in the game of marbles. To knuckle down "apply oneself earnestly" is 1864 in American English, extended from marbles (putting a knuckle on the ground in assuming the hand position preliminary to shooting); to knuckle under "submit, give in" is first recorded 1740, supposedly from the former more general sense of "knuckle" and here meaning "knee," hence "to kneel." The face-busting knuckle-duster is from 1858 (a duster was a type of protective coat worn by workmen).
knuckleball (n.): also knuckle-ball, baseball pitch, by 1909, from knuckle (n.) + ball (n.1). So called from the position of the fingers in throwing it. Related: Knuckleballer.
knucklehead (n.): "stupid person," 1890, American English, from knuckle (n.) + head (n.).
"That infernal knuckle-head at the camp ought to have reported before now," he thought to himself, as he smoked. [Charles H. Shinn, "The Quicksands of Toro," in "Belford's Magazine," vol. V, June-November 1890, New York]
From 1869 as the name of a part in a type of mechanical coupling device. Popularized in the "stupid person" sense from 1942, from character R.F. Knucklehead, star of "Don't" posters hung up at U.S. Army Air Force training fields.
Everything Knucklehead does is wrong and ends in disaster. He endures one spectacular crash after another so that the students at the Gulf Coast Air Force Training Center may profit by his mistakes, and it looks now as if there will be no let-up in his agony. ["Life," May 25, 1942]
knurl (n.): "hard excrescence," c. 1600, probably a diminutive of Middle English knor "knot" (c. 1400), related to gnarled, from Proto-Germanic *knur- (cognates: German knorren "a knotty excrescence"). Related: Knurly.
koala (n.): Australian marsupial, 1808, from the Aboriginal name of the animal, variously given as koola, kulla, kula.
koan (n.): Zen paradox, 1946, from Japanese ko "public" + an "matter for thought."
Kobe: type of fine beef, named for the region in Japan where it is raised, from Japanese ko "god" + he "house."
Kodak: brand of camera, arbitrary coinage by U.S. inventor George Eastman (1854-1932), U.S. trademark registered Sept. 4, 1888. In 1890s, practically synonymous with camera and also used as a verb. Kodachrome, registered trademark for a method of color photography, 1915; the product was discontinued in 2006.
Kodiak: Alaskan island, from Russian Kadiak, from Alutiiq (Eskimo) qikertaq "island."
Koh-i-noor (n.): famous diamond, one of the British crown jewels after the annexation of Punjab in 1849, from Persian koh-i-nur, literally "mountain of light," from Persian koh "mountain" + Arabic nur "light."
kohl (n.): "powder used to darken eyelids," 1799, from Arabic kuhl (see alcohol).
kohlrabi (n.): also kohl-rabi, kohl rabi, kind of cabbage, 1807, from German Kohlrabi (16c.), from Italian cavoli rape, plural of cavolo rapo "cole-rape;" see cole + rape (n.2). Form influenced in German by German kohl "cabbage."
koi (n.): 1727, from a Japanese local name for "carp."
koine (n.): common literary dialect of Greek in Roman and early medieval period, 1903, from feminine singular of Greek koinos "common, ordinary" (see coeno-). Used earlier as a Greek word in English.
koinonia (n.): 1865, Greek, literally "communion, fellowship," from koinos "common, ordinary" (see coeno-).