英语词源字典 - 在线词源网站

duds (n.)[duds 词源字典]: c. 1300, dudde "cloak, mantle," later in plural, "ragged clothing" (1560s), of uncertain origin.[duds etymology, duds origin, 英语词源]
due (adj.): early 14c., "customary, regular;" mid-14c., "owing, payable," from Old French deu, past participle of devoir "to owe," from Latin debere "to owe" (see debt).

In reference to points of the compass (as in due east) it is attested from c. 1600, originally nautical, from notion of "fitting, rightful." As an adverb from 1590s; as a noun from early 15c. Prepositional phrase due to (much maligned by grammarians) is from 1897.
duel (n.): 1590s (from late 13c. in Latin form), from Medieval Latin duellum "combat between two persons," by association with Latin duo "two," but originally from Latin duellum "war," an Old Latin form of bellum (see bellicose). Retained in poetic and archaic language and apparently given a special meaning in Medieval or Late Latin of "one-on-one combat" on fancied connection with duo "two."
duel (v.): 1640s, see duel (n.). Related: Dueled; dueling; duelling.
duelist (n.): 1590s, from duel + -ist.
duenna (n.): 1660s, "chief lady in waiting upon the queen of Spain," also "an elderly woman in charge of girls from a Spanish family," from Spanish dueña "married lady, mistress" (fem. of dueño "master"), from Latin domina (see dame). Sense extended in English to "any elderly woman chaperon of a younger woman" (1708).
dues (n.): "fee for membership," 1660s, from plural of due (n.). To pay (one's) dues in the figurative sense is from 1943. "Giue them their due though they were diuels" [1589].
duet (n.): 1740, from French duet, from Italian duetto "short musical composition for two voices," diminutive of duo "two" (see two). As a verb, from 1822. The Italian form of the noun was used in English from c. 1724.
duff (n.): "buttocks, rump," 1830s, of unknown origin.
duffel: see duffle.
duffer (n.): "inept person; old man," especially "bad golfer," 1842, perhaps from Scottish duffar "dull or stupid person," from dowf "stupid," literally "deaf," from Old Norse daufr, with pejorative suffix -art. Or perhaps from 18c. thieves' slang duff (v.) "to dress or manipulate an old thing and make it look new."
duffle (n.): 1670s, from Dutch duffel, from Duffel, town in Brabant where the cloth was originally sold. Duffel bag is American English, first recorded 1917 in a letter of e e cummings.
dufus (n.): see doofus.
dug (n.): "animal nipple," or, contemptuously, "the human female breast," 1520s, origin obscure, related to Swedish dagga, Danish dægge "to suckle."
dug (v.): past tense and past participle of dig (v.).
Dugan: from Irish Dubhagan, diminutive of dubh "black."
dugong (n.): 1800, from Malay duyung, which is dugung in the Philippines.
dugout (n.): also dug-out, "canoe," 1722, American English, from dug, past participle of dig (v.) + out (adv.). Baseball sense is first recorded 1914, from c. 1855 meaning of "rough shelter."
duke (n.): early 12c., "sovereign prince," from Old French duc (12c.) and directly from Latin dux (genitive ducis) "leader, commander," in Late Latin "governor of a province," from ducere "to lead," from PIE *deuk- "to lead" (cognates: Old English togian "to pull, drag," Old High German ziohan "to pull," Old English togian "to draw, drag," Middle Welsh dygaf "I draw").

Applied in English to "nobleman of the highest rank" probably first mid-14c., ousting native earl. Also used to translate various European titles (such as Russian knyaz).
dukes (n.): "hands," 1874, now mainly in put up your dukes (phrase from 1859), probably not connected to duke (n.). Chapman ["Dictionary of American Slang"] suggests Romany dook "the hand as read in palmistry, one's fate;" but Partridge ["Slang To-day and Yesterday"] gives it a plausible, if elaborate, etymology as a contraction of Duke of Yorks, rhyming slang for forks, a Cockney term for "fingers," thus "hands."