circumstantiate (v.)youdaoicibaDictYouDict[circumstantiate 词源字典]
1650s, from Latin circumstantia "surrounding condition" (see circumstance) + -ate (2). Related: Circumstantiated; circumstantiating; circumstantiation.[circumstantiate etymology, circumstantiate origin, 英语词源]
circumvent (v.)youdaoicibaDictYouDict
mid-15c., "to surround by hostile stratagem," from Latin circumventus, past participle of circumvenire "to get around, be around, encircle, surround," in figurative sense "to oppress, assail, cheat," from circum "around" (see circum-) + venire "to come" (see venue). Meaning "to go round" is from 1840. Related: Circumvented; circumventing.
circumvention (n.)youdaoicibaDictYouDict
early 15c., from Latin circumventionem (nominative circumventio), noun of action from past participle stem of circumvenire "to get around" (see circumvent).
circumvolution (n.)youdaoicibaDictYouDict
mid-15c., noun of action from past participle stem of Latin circumvolvere "to revolve through, to roll around" (see circumvolve).
circumvolve (v.)youdaoicibaDictYouDict
1640s, from Latin circumvolvere "to roll round, revolve," from circum- (see circum-) + volvere "to turn around, roll" (see volvox). Related: Circumvolved; circumvolving.
circus (n.)youdaoicibaDictYouDict
late 14c., in reference to ancient Rome, from Latin circus "ring, circular line," which was applied by Romans to circular arenas for performances and contests and oval courses for racing (especially the Circus Maximus), from or cognate with Greek kirkos "a circle, a ring," from PIE *kirk- from root *(s)ker- (3) "to turn, bend" (see ring (n.)).

In reference to modern large arenas for performances from 1791; sense then extended to the performing company, hence "traveling show" (originally traveling circus, 1838). Extended in World War I to squadrons of military aircraft. Meaning "lively uproar, chaotic hubbub" is from 1869. Sense in Picadilly Circus and other place names is from early 18c. sense "buildings arranged in a ring," also "circular road." The adjective form is circensian.
cire (adj.)youdaoicibaDictYouDict
1921, from French ciré, literally "waxed" (12c.), from Latin cera "wax" (see cere (n.)). Often short for ciré silk.
cirque (n.)youdaoicibaDictYouDict
c. 1600, "a circus," from French cirque (14c.), from Latin circus (see circus). Compare Italian and Spanish circo.
cirrhosis (n.)youdaoicibaDictYouDict
1827, coined in Modern Latin by French physician René-Théophile-Hyacinthe Laennec (1781-1826) with -osis and Greek kirrhos "tawny," which is of unknown origin. So called for the orange-yellow appearance of the diseased liver. Related: Cirrhotic.
cirro-youdaoicibaDictYouDict
word-forming element meaning "involving cirrus clouds," from comb. form of Latin cirrus (see cirrus).
cirrocumulus (n.)youdaoicibaDictYouDict
1803, from cirrus + cumulus.
cirrous (adj.)youdaoicibaDictYouDict
1650s in biology; 1815 in meteorology, from Latin cirrus (see cirrus) + -ous.
cirrus (n.)youdaoicibaDictYouDict
1708, "curl-like fringe or tuft," from Latin cirrus "a lock of hair, tendril, curl, ringlet of hair; the fringe of a garment." In meteorology, cirrus clouds attested from 1803. So called from fancied resemblance of shape.
cis-youdaoicibaDictYouDict
word-forming element meaning "on the near side of, on this side," from Latin preposition cis "on this side" (in reference to place or time), related to citra (adv.) "on this side," from PIE *ki-s, from root *ko- "this" (cognates: Old Church Slavonic si, Lithuanian šis, Hittite ki "this," Old English hider, Gothic hidre "hither;" see he). Opposed to trans- or ultra-. Originally only of place, sometimes 19c. of time; 21c. of life situations (such as cis-gender, by 2011).
cisalpine (adj.)youdaoicibaDictYouDict
1540s, from Latin cisalpinus "on this side of the Alps" (from the Roman point of view), from cis- (see cis-) + Alpinus "Alpine" (see Alpine). Compare ultramontane.
ciseaux (n.)youdaoicibaDictYouDict
1892 in dance, French (plural), literally "scissors" (see scissors).
cismontane (adj.)youdaoicibaDictYouDict
from Latin cis- "on this side of" (see cis-) + stem of mons (see mount (n.)).
cissy (n.)youdaoicibaDictYouDict
chiefly British English variant of sissy (q.v.).
cist (n.)youdaoicibaDictYouDict
"sepulchral chest or chamber," 1804, in some cases from Latin cista "wickerwork basket, box," from Greek kiste "box, chest" (see chest); according to OED, in some cases from Welsh cist in cist faen "stone coffin," the first element of which is from the Latin word.
Cistercian (adj.)youdaoicibaDictYouDict
c. 1600, "pertaining to the Cistercian order of monks," with -an + Medieval Latin Cistercium (French Cîteaux), site of an abbey near Dijon, where the monastic order was founded 1098 by Robert of Molesme. As a noun, "monk of the Cistercian order," from 1610s.