yokel (n.)youdaoicibaDictYouDict[yokel 词源字典]
1812, perhaps from dialectal German Jokel, disparaging name for a farmer, originally diminutive of Jakob. Or perhaps from English yokel, dialectal name for "woodpecker."[yokel etymology, yokel origin, 英语词源]
yolk (n.)youdaoicibaDictYouDict
Old English geolca, geoloca "yolk," literally "the yellow part," from geolu "yellow" (see yellow (adj.)). Formerly also spelled yelk.
Yom KippuryoudaoicibaDictYouDict
Jewish holiday, 1854, from Mishnaic Hebrew yom kippur (in Biblical Hebrew, yom kippurim), literally "day of atonement," from yom "day" + kippur "atonement, expiation."
yon (adj., pron.)youdaoicibaDictYouDict
Old English geon "that (over there)," from Proto-Germanic *jaino- (cognates: Old Frisian jen, Old Norse enn, Old High German ener, Middle Dutch ghens, German jener, Gothic jains "that, you"), from PIE pronominal stem *i- (cognates: Sanskrit ena-, third person pronoun, anena "that;" Latin idem "the same," id "it, that one;" Old Church Slavonic onu "he;" Lithuanian ans "he"). As an adverb from late 15c., a shortening of yonder.
yond (adv., prep.)youdaoicibaDictYouDict
Old English geond "beyond, yonder," related to geon (see yon).
yonder (adv.)youdaoicibaDictYouDict
"within sight but not near," c. 1300, from Old English geond "throughout, up to, as far as" (see yond) + comparative suffix -er (2). Cognate with Middle Low German ginder, Middle Dutch gender, Dutch ginder, Gothic jaindre. Now replaced except in poetic usage by ungrammatical that.
yoni (n.)youdaoicibaDictYouDict
1799, from Sanskrit, "female sexual principle as an object of veneration," literally "vulva, womb."
yoo-hoo (interj.)youdaoicibaDictYouDict
exclamation to call attention, by 1913.
yore (adv.)youdaoicibaDictYouDict
Old English geara "of yore, formerly, in former times," literally "of years," originally adverbial genitive plural of gear (see year), and used without of. As a noun from mid-14c.
YorkyoudaoicibaDictYouDict
city in northern England, Old English Eoforwic, earlier Eborakon (c. 150), an ancient Celtic name, probably meaning "Yew-Tree Estate," but Eburos may also be a personal name. Related: Yorkist; Yorkish; Yorker. Yorkshire pudding is recorded from 1747; Yorkshire terrier first attested 1872; short form Yorkie is from 1950.
YorubayoudaoicibaDictYouDict
west Nigerian people, also the name of their language.
YosemiteyoudaoicibaDictYouDict
from Southern Sierra Miwok /yohhe'meti/ "they are killers." "[E]vidently a name given to the Indians of the valley by those outside it." [Bright]
you (pron.)youdaoicibaDictYouDict
Old English eow, dative and accusative plural of þu (see thou), objective case of ge, "ye" (see ye), from Proto-Germanic *juz-, *iwwiz (cognates: Old Norse yor, Old Saxon iu, Old Frisian iuwe, Middle Dutch, Dutch u, Old High German iu, iuwih, German euch), from PIE *yu, second person (plural) pronoun.

Pronunciation of you and the nominative form ye gradually merged from 14c.; the distinction between them passed out of general usage by 1600. Widespread use of French in England after 12c. gave English you the same association as French vous, and it began to drive out singular nominative thou, originally as a sign of respect (similar to the "royal we") when addressing superiors, then equals and strangers, and ultimately (by c. 1575) becoming the general form of address. Through 13c. English also retained a dual pronoun ink "you two; your two selves; each other."
young (n.)youdaoicibaDictYouDict
"young animals collectively, offspring," late 15c., from young (adj.).
young (adj.)youdaoicibaDictYouDict
Old English geong "youthful, young; recent, new, fresh," from Proto-Germanic *juwunga- (cognates: Old Saxon and Old Frisian jung, Old Norse ungr, Middle Dutch jonc, Dutch jong, Old High German and German jung, Gothic juggs), from PIE *yuwn-ko-, suffixed form of root *yeu- "vital force, youthful vigor" (cognates: Sanskrit yuva "young," Latin juvenis "young," Lithuanian jaunas, Old Church Slavonic junu, Russian junyj "young," Old Irish oac, Welsh ieuanc "young").

From c. 1830-1850, Young France, Young Italy, etc., were loosely applied to "republican agitators" in various monarchies; also, especially in Young England, Young America, used generally for "typical young person of the nation." For Young Turk, see Turk.
youngster (n.)youdaoicibaDictYouDict
1580s, from young + -ster. Earlier was youngling, from Old English geongling.
younkeryoudaoicibaDictYouDict
c. 1500, "young nobleman," from Middle Dutch jonckher (Dutch jonker), from jonc "young" (see young (adj.)) + here "lord, master" (see Herr). Compare junker.
youryoudaoicibaDictYouDict
Old English eower, possessive pronominal adjective, genitive of ge "ye" (see ye), from Proto-Germanic base of you. Cognate with Old Saxon iuwar, Old Frisian iuwer, Old Norse yðvarr, Old High German iuwer, German euer, Gothic izwar "your." Used in titles of honor by mid-14c.
yourn (pron.)youdaoicibaDictYouDict
dialectal possessive pronoun from your, attested from late 14c. See her.
yours (pron.)youdaoicibaDictYouDict
absolutive form of your, c. 1300, on model of his, ours, etc. Yours truly "myself" is from 1833, from the common subscription of letters.
It is difficult to say what will succeed, and still more to pronounce what will not. I am at this moment in that uncertainty (on our own score,) and it is no small proof of the author's powers to be able to charm and fix a mind's attention on similar subjects and climates in such a predicament. That he may have the same effect upon all his readers is very sincerely the wish, and hardly the doubt, of yours truly,
"B."
[Lord Byron to John Murray, Dec. 4, 1813]