circumambient (adj.)youdaoicibaDictYouDict[circumambient 词源字典]
1630s, from circum- + ambient.[circumambient etymology, circumambient origin, 英语词源]
circumambulate (v.)youdaoicibaDictYouDict
1650s, from Latin circumambulatus, past participle of circumambulare "to walk around," from circum "around" (see circum-) + ambulare "to walk" (see amble). Related: Circumambulated; circumambulating; circumambulation.
circumcise (v.)youdaoicibaDictYouDict
mid-13c., "to cut off the foreskin," from Old French circoncisier "circumcise" (12c., Modern French circoncire), from Latin circumcisus, past participle of circumcidere "to cut round, to cut trim, to cut off" (see circumcision). Related: Circumcised; circumcising.
circumcision (n.)youdaoicibaDictYouDict
late 12c., from Latin circumcisionem (nominative circumcisio), noun of action from past participle stem of circumcidere "to cut around; cut, clip, trim," from circum "around" (see circum-) + caedere "to cut" (see -cide).
circumduction (n.)youdaoicibaDictYouDict
1570s, from Latin circumductionem (nominative circumductio), noun of action from past participle stem of circumducere "to lead around, move or drive around," from circum "around" (see circum-) + ducere "to lead" (see duke (n.)). Related: Circumduce.
circumference (n.)youdaoicibaDictYouDict
late 14c., from Latin circumferentia, neuter plural of circumferens, present participle of circumferre "to lead around, take around, carry around," from circum "around" (see circum-) + ferre "to carry" (see infer). A loan-translation of Greek periphereia "periphery, the line round a circular body," literally "a carrying round" (see periphery). Related: Circumferential.
circumflex (n.)youdaoicibaDictYouDict
1570s, from Latin (accentus) circumflexus, "bent around," past participle of circumflectere "to bend around," of a charioteer, "turn around" (from circum "around;" see circum-, + flectere "to bend;" see flexible); used as a loan-translation of Greek (prosodia) perispomenos (Dionysius of Halicarnassus), literally "drawn-around," with reference to shape.
circumfluent (adj.)youdaoicibaDictYouDict
1570s, from Latin circumfluentem (nominative circumfluens), present participle of circumfluere "to flow around," from circum- (see circum-) + fluere (see fluent).
circumjacent (adj.)youdaoicibaDictYouDict
late 15c., from Latin circumiacens, present participle of circumiacere "to border upon, to lie round about, enjoin," from circum- "around" (see circum-) + iacere "to throw, cast, hurl" (see jet (v.)). Related: Circumjacence; circumjacency.
circumlocution (n.)youdaoicibaDictYouDict
c. 1400, from Latin circumlocutionem (nominative circumlocutio) "a speaking around" (the topic), from circum- "around" (see circum-) + locutionem (nominative locutio) "a speaking," noun of action from past participle stem of loqui "to speak" (see locution). A loan-translation of Greek periphrasis (see periphrasis).
circumnavigate (v.)youdaoicibaDictYouDict
1630s, from Latin circumnavigatus, past participle of circumnavigare "to sail round," from circum "around" (see circum-) + navigare (see navigation). Related: Circumnavigated; circumnavigating; circumnavigable.
circumnavigation (n.)youdaoicibaDictYouDict
1705, from circumnavigate + -ion.
circumpolar (adj.)youdaoicibaDictYouDict
1680s in astronomy; 1690s in geography, from circum- + polar.
circumscribe (v.)youdaoicibaDictYouDict
late 14c., from Latin circumscribere "to make a circle around, encircle, draw a line around; limit, restrain, confine, set the boundaries of," from circum- "around" (see circum-) + scribere "write" (see script (n.)). Related: Circumscribed; circumscribing.
circumscription (n.)youdaoicibaDictYouDict
1530s, from Latin circumscriptionem (nominative circumscriptio) "an encircling; fact of being held to set limits," noun of action from past participle stem of circumscribere (see circumscribe). Figurative sense of "setting limits of meaning" is earliest in English.
circumspect (adj.)youdaoicibaDictYouDict
early 15c., from Latin circumspectus "deliberate, guarded, well-considered," past participle of circumspicere "look around, take heed," from circum- "around" (see circum-) + specere "to look" (see scope (n.1)). Related: Circumspectly; circumspectness.
circumspection (n.)youdaoicibaDictYouDict
late 14c., "careful observation of one's surroundings," from Old French circumspection (Modern French circonspection), from Latin circumspectionem (nominative circumspectio) "a looking around; foresight, caution," noun of action from past participle stem of circumspicere "to look around" (see circumspect).
circumstance (n.)youdaoicibaDictYouDict
early 13c., "conditions surrounding and accompanying an event," from Old French circonstance "circumstance, situation," also literally, "outskirts" (13c., Modern French circonstance), from Latin circumstantia "surrounding condition," neuter plural of circumstans (genitive circumstantis), present participle of circumstare "stand around, surround, encompass, occupy, take possession of" from circum "around" (see circum-) + stare "to stand" from PIE root *sta- "to stand" (see stet). The Latin word is a loan-translation of Greek peristasis.

Meaning "a person's surroundings, environment" is from mid-14c. Meaning "a detail" is from c. 1300; sense of "that which is non-essential" is from 1590s. Obsolete sense of "formality about an important event" (late 14c.) lingers in Shakespeare's phrase pomp and circumstance ("Othello" III, iii).
circumstances (n.)youdaoicibaDictYouDict
"condition of life, material welfare" (usually with a qualifying adjective), 1704, from circumstance.
circumstantial (adj.)youdaoicibaDictYouDict
c. 1600, from Latin circumstantia (see circumstance) + -al (1). Related: Circumstantially. Circumstantial evidence is attested by 1691.