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cognoscence (n.)[cognoscence 词源字典]: mid-15c., from Latin cognoscere "to know" (see cognizance).[cognoscence etymology, cognoscence origin, 英语词源]
cognoscente (n.): "connoisseur," 1778, from Italian cognoscente, Latinized from conoscente "connoisseur," literally "knowing man," from Latin cognoscentum (nominative cognoscens), present participle of cognoscere "to know" (see cognizance).
cognoscenti (n.): plural of cognoscente (q.v.).
cohabit (v.): euphemism since 1530s to describe a couple living together without benefit of marriage; back-formation from cohabitation. Related: Cohabited; cohabiting.
cohabitate (v.): 1630s, from Late Latin cohabitatus, past participle of cohabitare (see cohabitation). Related: Cohabitated; cohabitating.
cohabitation (n.): mid-15c., "action or state of living together (especially as husband and wife)," from Middle French cohabitation (Old French cohabitacion "cohabitation, sexual intercourse"), from Late Latin cohabitationem (nominative cohabitatio), noun of action from past participle stem of cohabitare "to dwell together," from co- "with, together" (see co-) + habitare "to live, dwell" (see habitat).
Cohen: Jewish surname indicating priestly descent, from Hebrew kohen "priest," from base of kihen "he acted as priest," related to Arabic kahana "he divined, prophesied."
cohere (v.): 1590s, from Latin cohaerere "to cleave together," in transferred use, "be coherent or consistent," from com- "together" (see co-) + haerere "to stick" (see hesitation). Related: Cohered; cohering.
coherence (n.): late 16c., from Middle French cohérence (16c.), from Latin cohaerentia, noun of state from cohaerentem (see coherent). Related: Coherency.
coherent (adj.): 1550s, from Middle French cohérent (16c.), from Latin cohaerentem (nominative cohaerens), present participle of cohaerere "cohere," from com- "together" (see co-) + haerere "to stick" (see hesitation).
cohesion (n.): 1670s, from French cohésion, from Latin cohaesionem (nominative cohaesio) "a sticking together," noun of action from past participle stem of cohaerere "to stick together" (see cohere).
cohesive (adj.): c. 1730 (implied in cohesiveness), from Latin cohaes-, past participle stem of cohaerere (see cohere) + -ive. Related: Cohesively.
cohort (n.): early 15c., "company of soldiers," from Middle French cohorte (14c.) and directly from Latin cohortem (nominative cohors) "enclosure," meaning extended to "infantry company" in Roman army (a tenth part of a legion) through notion of "enclosed group, retinue," from com- "with" (see co-) + root akin to hortus "garden," from PIE *ghr-ti-, from root *gher- (1) "to grasp, enclose" (see yard (n.1)). Sense of "accomplice" is first recorded 1952, American English, from meaning "group united in common cause" (1719).
coif (n.): late 13c., "close-fitting cap," from Old French coife "skull-cap, cap worn under a helmet, headgear" (12c., Modern French coiffe), from Late Latin coifa "a cap, hood" (source of Italian cuffia, Spanish cofia, escofia), of West Germanic origin (compare Old High German kupphia, Middle High German kupfe "cap").
coif (v.): mid-15c., "to cover with a cap," from Middle French coiffer, from Old French coife (see coif (n.)); sense of "to arrange the hair" is attested in English from 1835. Related: Coifed; coifing.
coiffeur (n.): 1847, from French coiffeur "hairdresser," from coiffer "to dress hair," from Old French coife, originally, "inner part of the helmet" (see coif (n.)). A woman hairdresser would be properly a coiffeuse.
coiffure (n.): "style or fashion of wearing the hair," 1630s, from French coiffure, from coiffer (see coiffeur).
coign (n.): archaic spelling of quoin (q.v.), surviving only in Shakespeare's coign of vantage ("Macbeth" I.vi.), popularized by Sir Walter Scott, properly "a projecting corner" (for observation).
coil (v.): "to wind," 1610s, from Middle French coillir "to gather, pick," from Latin colligere "to gather together" (see collect). Meaning specialized perhaps in nautical usage. Related: Coiled; coiling.
coil (n.): 1620s, from coil (v.). Related: Coils.