cata-youdaoicibaDictYouDict[cata- 词源字典]
word-forming element from Latinized form of Greek kata-, before vowels kat-, from kata "down from, down to." Its principal sense is "down," but occasionally it has senses of "against" (catapult)or "wrongly" (catachresis). Also sometimes used as an intensive or with a sense of completion of action (catalogue). Very active in ancient Greek, this prefix is found in English mostly in words borrowed through Latin after c. 1500.[cata- etymology, cata- origin, 英语词源]
catabolism (n.)youdaoicibaDictYouDict
1876, katabolism, "destructive metabolism," from Greek katabole "a throwing down" (also "a foundation"), from kataballein "to throw down," from kata- "down" (see cata-) + ballein "to throw" (see ballistics). Barnhart says probably formed in English on the model of metabolism. Spelling Latinized from 1889.
catachresis (n.)youdaoicibaDictYouDict
1580s, from Latin catachresis, from Greek katakhresis "misuse" (of a word), from katakhresthai "to misuse," from kata- "down" (here with a sense of "perversion;" see cata-) + khresthai "to use" (see hortatory). Related: Catachrestic; catachrestical; catachrestically.
catafalque (n.)youdaoicibaDictYouDict
1640s, from French catafalque (17c.), from Italian catafalco "scaffold," from Vulgar Latin *catafalicum, from Greek kata- "down" (see cata-), used in Medieval Latin with a sense of "beside, alongside" + fala "scaffolding, wooden siege tower," a word said to be of Etruscan origin. The Medieval Latin word also yielded Old French chaffaut, chafaud (Modern French échafaud) "scaffold."
catalectic (adj.)youdaoicibaDictYouDict
1580s, in a line of verse, "wanting an unaccented syllable in the last foot," from Late Latin catalecticus, from Greek katalektikos "leaving off," from kata- "down" (see cata-) + legein "to leave off, cease from," from PIE *(s)leg- "to be slack, be languid" (see lax). A complete line is said to be acatalectic.
catalepsy (n.)youdaoicibaDictYouDict
late 14c., cathalempsia, from Medieval Latin catalepsia, from Late Latin catalepsis, from Greek katalepsis "a seizure, a seizing upon, a taking possession," from kataleptos "seized," from katalambanein "to seize upon," from kata- "down" (see cata-) + lambanein "to take" (see analemma).
catalysis (n.)youdaoicibaDictYouDict
1650s, "dissolution," from Latinized form of Greek katalysis "dissolution, a dissolving" (of governments, military units, etc.), from katalyein "to dissolve," from kata- "down" (or "completely"), see cata-, + lyein "to loosen" (see lose). Chemical sense "change caused by an agent which itself remains unchanged" is attested from 1836, introduced by Swedish chemist Jöns Jakob Berzelius (1779-1848).
cataplexy (n.)youdaoicibaDictYouDict
"the state of an animal when it is feigning death," 1883, from German kataplexie, from Greek kataplexis "stupefaction, amazement, consternation," from kataplessein "to strike down" (with fear, etc.), from kata- "down" (see cata-) + plessein "to strike, hit," from PIE *plak- (2) "to strike" (see plague (n.)). Related: Cataplectic.
catarrh (n.)youdaoicibaDictYouDict
late 14c., from Medieval Latin catarrus, from Late Latin catarrhus, from Greek katarrhous "a catarrh, a head cold," literally "a flowing down," earlier kata rrhoos, ultimately from kata- "down" (see cata-) + rhein "to flow" (see rheum). Related: Catarrhalcatarrhous.
catatonia (n.)youdaoicibaDictYouDict
1888, from medical Latin catatonia; replacing katatonia (1880s), which was formed directly from Greek kata- "down" (see cata-) + tonos "tone" (see tenet) + abstract noun ending -ia.
catawampus (adj.)youdaoicibaDictYouDict
also catawampous, cattywampus, catiwampus, etc. (see "Dictionary of American Slang" for more), American colloquial. First element perhaps from obsolete cater "to set or move diagonally" (see catty-cornered); second element perhaps related to Scottish wampish "to wriggle, twist, or swerve about." Or perhaps simply the sort of jocular pseudo-classical formation popular in the slang of those times, with the first element suggesting Greek kata-.

Earliest use seems to be in adverbial form, catawampusly (1834), expressing no certain meaning but adding intensity to the action: "utterly, completely; with avidity, fiercely, eagerly." It appears as a noun from 1843, as a name for an imaginary hobgoblin or fright, perhaps from influence of catamount. The adjective is attested from the 1840s as an intensive, but this is only in British lampoons of American speech and might not be authentic. It was used in the U.S. by 1864 in a sense of "askew, awry, wrong" and by 1873 (noted as a peculiarity of North Carolina speech) as "in a diagonal position, on a bias, crooked."
catechesis (n.)youdaoicibaDictYouDict
from Greek katekhesis "instruction by word of mouth," from katekhein "to instruct orally," originally "to resound" (with sense evolution via "to sound (something) in someone's ear; to teach by word of mouth." From kata- "down" (in this case, "thoroughly") + ekhein "to sound, ring," from ekhe "sound," from PIE *(s)wagh- "to resound" (see echo (n.)). Related: Catachectic; catachectical.
cathode (n.)youdaoicibaDictYouDict
1834, from Latinized form of Greek kathodos "a way down," from kata- "down" (see cata-) + hodos "way" (see cede). Proposed by the Rev. William Whewell (1794-1866), English polymath, and published by English chemist and physicist Michael Faraday (1791-1867). So called from the path the electric current was supposed to take. Related: Cathodic; cathodal. Cathode ray first attested 1880, but the phenomenon known from 1859; cathode ray tube is from 1905.
catoblepas (n.)youdaoicibaDictYouDict
late 14c., from Latin catoblepas, from Greek katobleps, from kato "downward" (related to kata-) + blepein "to look," but this might be ancient folk etymology. Name given by ancient authors to some African animal.
A wylde beest that hyghte Catoblefas and hath a lytyll body and nyce in all membres and a grete heed hangynge alway to-warde the erth. [John of Trevisa, translation of Bartholomew de Glanville's "De proprietatibus rerum," 1398]
catoptric (adj.)youdaoicibaDictYouDict
"pertaining to mirrors or a mirror," 1774, from Latinized form of Greek katoptrikos, from katoptron "mirror," from kata- "against" (see cata-) + stem of optos "seen, visible" (see optic) + instrumental suffix -tron. Related: Catoptrics; catoptrical.