danger (n.)youdaoicibaDictYouDict[danger 词源字典]
mid-13c., "power of a lord or master, jurisdiction," from Anglo-French daunger, Old French dangier "power, power to harm, mastery, authority, control" (12c., Modern French danger), alteration (due to assoc. with damnum) of dongier, from Vulgar Latin *dominarium "power of a lord," from Latin dominus "lord, master" (see domain).

Modern sense of "risk, peril" (from being in the control of someone or something else) evolved first in French and was in English late 14c. Replaced Old English pleoh; in early Middle English this sense is found in peril.[danger etymology, danger origin, 英语词源]
dangerous (adj.)youdaoicibaDictYouDict
early 13c., "difficult, arrogant, severe" (the opposite of affable), from Anglo-French dangerous, Old French dangeros (12c., Modern French dangereux), from danger (see danger).

In Chaucer, it means "hard to please, reluctant to give;" sense of "full of danger, risky" is from late 15c. Other words used in this sense included dangersome (1560s), dangerful (1540s). Related: Dangerously.
dangle (v.)youdaoicibaDictYouDict
1590s, probably from Scandinavian (compare Danish dangle, Swedish dangla "to swing about," Norwegian dangla), perhaps via North Frisian dangeln. Related: Dangled; dangling.
DanielyoudaoicibaDictYouDict
proper name, Hebrew, literally "God is my judge;" related to Dan, literally "he who judges," the tribe descended from Jacob's son of that name in Old Testament. Consistently in the top 15 names for boys born in the U.S. from 1972 through 2008.
DanielleyoudaoicibaDictYouDict
fem. proper name, from Daniel. In U.S., little used before c. 1940, and in top 20 for girls born from 1984-1994.
DanishyoudaoicibaDictYouDict
Old English Denisc "people of Denmark" (see Dane); danish pastry is 1934; shortened form danish is from 1963.
dank (adj.)youdaoicibaDictYouDict
c. 1400, earlier as a verb (early 14c.), now obsolete, meaning "to moisten," used of mists, dews, etc. Perhaps from Scandinavian (compare Swedish dank "moist place," dänka "to moisten") or German (compare Middle High German damph, Dutch damp "vapor"). Now largely superseded by damp (adj.). Related: Dankness.
DannyyoudaoicibaDictYouDict
familiar form of proper name Daniel.
DanteyoudaoicibaDictYouDict
masc. proper name, most modern uses outside Italy ultimately are in reference to Dante Alighieri (c. 1265-1321), the great poet; the name is a shortening of Latin Durante, from durare "harden, endure" (see endure).
DanubeyoudaoicibaDictYouDict
major river of Europe (German Donau, Hungarian Duna, Russian Dunaj), from Latin Danuvius, from Celtic *danu(w)-yo-, from PIE *danu- "river" (compare Don, Dnieper, Dniester).
Daoism (n.)youdaoicibaDictYouDict
alternative Romanization of Taoism (q.v.).
dap (n.)youdaoicibaDictYouDict
fist-bump greeting, with various theories as to origin and name meaning. In U.S. popular black culture by 1972 and controversial during the Vietnam War when used by U.S. soldiers, as it often was regarded by whites as a ritual act of black solidarity. Probably imitative (dap was used in 19c. for the bounce of a ball or the skip of a stone on water). Dap, meanwhile, is listed in the DAS as black slang c. 1950 for "aware, up to date," also "stylish, well-dressed," in the latter case at least a shortening of dapper.
DaphneyoudaoicibaDictYouDict
fem. proper name, from Greek daphne "laurel, bay tree;" in mythology the name of a nymph, daughter of the river Peneus, metamorphosed into a laurel by Gaia to save her from being ravished as she was pursued by Apollo.
dapper (adj.)youdaoicibaDictYouDict
mid-15c., "elegant," from Middle Dutch or Middle Low German dapper "bold, strong, sturdy," later "quick, nimble," from Proto-Germanic *dapraz, perhaps with ironical shift of meaning (cognates: Old High German tapfar "heavy," German tapfer "brave"), from PIE root *dheb- "dense, firm, compressed."
dapple (v.)youdaoicibaDictYouDict
early 15c. (implied in past participle adjective dappled), perhaps from a Scandinavian source akin to Old Norse depill "spot," Norwegian dape "puddle." Perhaps a back-formation from, or merger with, Middle English adjective dapple-gray "apple-gray" (late 14c.), based on resemblance to the markings on an apple (compare Old Norse apalgrar "dapple-gray"), or, as it was used of gray horses with round blotches, perhaps via resemblance to apples themselves.
daryoudaoicibaDictYouDict
Arabic word, literally "house," used in place names, such as Dar es Salaam, Tanzania, literally "House of Peace."
Darby and JoanyoudaoicibaDictYouDict
1735, characteristic name of an old, happily married couple.
dare (v.)youdaoicibaDictYouDict
from first and third person singular of Old English durran "to brave danger, dare; venture, presume," from Proto-Germanic *ders- (cognates: Old Norse dearr, Old High German giturran, Gothic gadaursan), from PIE *dhers- "to dare, be courageous" (cognates: Sanskrit dadharsha "to be bold;" Old Persian darš- "to dare;" Greek thrasys "bold;" Old Church Slavonic druzate "to be bold, dare;" Lithuanian dristi "to dare," drasus "courageous").

An Old English irregular preterite-present verb: darr, dearst, dear were first, second and third person singular present indicative; mostly regularized 16c., though past tense dorste survived as durst, but is now dying, persisting mainly in northern English dialect. Meaning "to challenge or defy (someone)" is first recorded 1570s.
dare (n.)youdaoicibaDictYouDict
1590s, from dare (v.).
daredevil (n.)youdaoicibaDictYouDict
1794, "recklessly daring person," from dare (v.) + devil (n.). The devil might refer to the person, or the sense might be "one who dares the devil" (compare scarecrow, pickpocket, cutthroat, also fear-babe a 16c. word for "something that frightens children"). As an adjective, from 1832.