weigh (v.) Look up weigh at Dictionary.com
Old English wegan (class V strong verb, past tense wæg, past participle wægon) "find the weight of, measure; have weight; lift, carry, support, sustain, bear; move," from Proto-Germanic *wegan (cognates: Old Saxon wegan, Old Frisian wega, Dutch wegen "to weigh," Old Norse vega, Old High German wegan "to move, carry, weigh," German wiegen "to weigh"), from PIE *wegh- "to move" (cognates: Sanskrit vahati "carries, conveys," vahitram "vessel, ship;" Avestan vazaiti "he leads, draws;" Greek okhos "carriage;" Latin vehere "to carry, convey;" Old Church Slavonic vesti "to carry, convey;" Lithuanian vežu "to carry, convey;" Old Irish fecht "campaign, journey").

The original sense was of motion, which led to that of lifting, then to that of "measure the weight of." The older sense of "lift, carry" survives in the nautical phrase weigh anchor. Figurative sense of "to consider, ponder" (in reference to words, etc.) is recorded from mid-14c. To weigh in in the literal sense is from 1868, originally of jockeys; figurative meaning "bring one's influence to bear" is from 1909.
weight (n.) Look up weight at Dictionary.com
Old English gewiht "weighing, weight, downward force of a body, heaviness," from Proto-Germanic *wihti- (cognates: Old Norse vætt, Danish vegt, Old Frisian wicht, Middle Dutch gewicht, German Gewicht), from *weg- (see weigh).

Figurative sense of "burden" is late 14c. To lose weight "get thinner" is recorded from 1961. Weight Watcher as a trademark name dates from 1960. To pull one's weight (1921) is from rowing. To throw (one's) weight around figuratively is by 1922. Weight-training is from 1945. Weight-lifting is from 1885; weight-lifter (human) from 1893.
weight (v.) Look up weight at Dictionary.com
"to load with weight," 1747 (figuratively, of the mind, from 1640s), from weight (n.). Of horses in a handicap race, 1846. Sense in statistics is recorded from 1901. Related: Weighted; weighting.
weightage (n.) Look up weightage at Dictionary.com
1893, from weight (n.) + -age.
weightless (adj.) Look up weightless at Dictionary.com
"having no weight," 1540s, from weight (n.) + -less. Related: Weightlessly; weightlessness (1867).
weighty (adj.) Look up weighty at Dictionary.com
late 14c., "heavy;" late 15c., "important, serious, grave;" from weight (n.) + -y (2). Related: Weightiness.
Weimar (adj.) Look up Weimar at Dictionary.com
in reference to the pre-1933 democratic government of Germany, 1932, from name of city in Thuringia where German constitution was drawn up in 1919. The place name is a compound of Old High German wih "holy" + mari "lake" (see mere (n.)).
Weimaraner (n.) Look up Weimaraner at Dictionary.com
dog breed, 1943, from Weimar, german city, + German suffix -aner indicating "of this place." Originally bred as a hunting dog in the Weimar region.
weir (n.) Look up weir at Dictionary.com
Old English wer "dam, fence, enclosure," especially one for catching fish (related to werian "dam up"), from Proto-Germanic *wer-jon- (cognates: Old Norse ver, Old Frisian and Middle Dutch were, Dutch weer, Old High German wari, German Wehr "defense, protection," Gothic warjan "to defend, protect"), from PIE *wer- (5) "to cover, shut" (cognates: Sanskrit vatah "enclosure," vrnoti "covers, wraps, shuts;" Lithuanian užveriu "to shut, to close;" Old Persian *pari-varaka "protective;" Latin (op)erire "to cover," (ap)erire "open, uncover" (with ap- "off, away"); Old Church Slavonic vora "sealed, closed," vreti "shut;" Old Irish feronn "field," properly "enclosed land").
weird (adj.) Look up weird at Dictionary.com
c.1400, "having power to control fate, from wierd (n.), from Old English wyrd "fate, chance, fortune; destiny; the Fates," literally "that which comes," from Proto-Germanic *wurthiz (cognates: Old Saxon wurd, Old High German wurt "fate," Old Norse urðr "fate, one of the three Norns"), from PIE *wert- "to turn, to wind," (cognates: German werden, Old English weorðan "to become"), from root *wer- (3) "to turn, bend" (see versus). For sense development from "turning" to "becoming," compare phrase turn into "become."

The sense "uncanny, supernatural" developed from Middle English use of weird sisters for the three fates or Norns (in Germanic mythology), the goddesses who controlled human destiny. They were portrayed as odd or frightening in appearance, as in "Macbeth" (and especially in 18th and 19th century productions of it), which led to the adjectival meaning "odd-looking, uncanny" (1815); "odd, strange, disturbingly different" (1820). Related: Weirdly; weirdness.
weirdo (n.) Look up weirdo at Dictionary.com
"strange person," 1955, from weird. Compare earlier Scottish weirdie "young man with long hair and a beard" (1894).
welch (v.) Look up welch at Dictionary.com
1857, racing slang, "to refuse or avoid payment of money laid as a bet," probably a disparaging use of the national name Welsh. Related: Welched; welching.
welcome (n.) Look up welcome at Dictionary.com
Old English wilcuma "welcome!" exclamation of kindly greeting, from earlier wilcuma (n.) "welcome guest," literally "one whose coming suits another's will or wish," from willa "pleasure, desire, choice" (see will (n.)) + cuma "guest," related to cuman (see come). Similar formation in Old High German willicomo, Middle Dutch wellecome. Meaning "entertainment or public reception as a greeting" is recorded from 1530. The adjective is from Old English wilcuma. You're welcome as a formulaic response to thank you is attested from 1907. Welcome mat is from 1908; welcome wagon is attested from 1940.
welcome (v.) Look up welcome at Dictionary.com
Old English wilcumian "to welcome, greet gladly," from wilcuma (see welcome (n.)). Related: Welcomed; welcoming.
weld (n.2) Look up weld at Dictionary.com
"joint formed by welding," 1831, from weld (v.).
weld (v.) Look up weld at Dictionary.com
1590s, "unite or consolidate by hammering or compression, often after softening by heating," alteration of well (v.) "to boil, rise;" influenced by past participle form welled. Related: Welded; welding.
weld (n.1) Look up weld at Dictionary.com
plant (Resedo luteola) producing yellow dye, late 14c., from Old English *wealde, perhaps a variant of Old English wald "forest" (see wold). Spanish gualda, French gaude are Germanic loan-words.
welder (n.) Look up welder at Dictionary.com
1828, agent noun from weld (v.).
welfare (n.) Look up welfare at Dictionary.com
c.1300, from Old English wel faran "condition of being or doing well," from wel (see well (adv.)) + faran "get along" (see fare (v.)). Similar formation in Old Norse velferð. Meaning "social concern for the well-being of children, the unemployed, etc." is first attested 1904; meaning "organized effort to provide for maintenance of members of a group" is from 1918. Welfare state is recorded from 1941.
welkin (n.) Look up welkin at Dictionary.com
"sky" (poetic), Old English wolcen "cloud," also "sky, heavens," from Proto-Germanic *welk- (cognates: Old Saxon wolkan, Old Frisian wolken, Middle Dutch wolke, Dutch wolk, Old High German wolka, German Wolke "cloud," from PIE *welg- "wet" (cognates: Lithuanian vilgyti "to moisten," Old Church Slavonic vlaga "moisture," Czech vlhky "damp").
well (adv.) Look up well at Dictionary.com
"in a satisfactory manner," Old English wel "abundantly, very, very much; indeed, to be sure; with good reason; nearly, for the most part," from Proto-Germanic *welo- (cognates: Old Saxon wela, Old Norse vel, Old Frisian wel, Dutch wel, Old High German wela, German wohl, Gothic waila "well"), from PIE root *wel- (2) "to wish, will" (cognates: Sanskrit prati varam "at will," Old Church Slavonic vole "well," Welsh gwell "better," Latin velle "to wish, will," Old English willan "to wish;" see will (v.)).

Also used in Old English as an interjection and an expression of surprise. The adjective was in Old English in the sense "in good fortune, happy," from the adverb; sense of "satisfactory" is from late 14c.; "agreeable to wish or desire" is from mid-15c.; "in good health, not ailing" is from 1550s. Well-to-do "prosperous" is recorded from 1825.
well (v.) Look up well at Dictionary.com
"to spring, rise, gush," Old English wiellan (Anglian wællan), causative of weallan "to boil, bubble up, rise (in reference to a river)" (class VII strong verb; past tense weoll, past participle weallen), from Proto-Germanic *wall- "roll" (cognates: Old Saxon wallan, Old Norse vella, Old Frisian walla, Old High German wallan, German wallen, Gothic wulan "to bubble, boil"), from PIE root *wel- (3) "to turn, roll" (see volvox), on notion of "roiling or bubbling water."
well (n.) Look up well at Dictionary.com
"hole dug for water, spring of water," Old English wielle (West Saxon), welle (Anglian) "spring of water, fountain," from wiellan (see well (v.)). "As soon as a spring begins to be utilized as a source of water-supply it is more or less thoroughly transformed into a well" [Century Dictionary]. Figurative sense of "source from which anything is drawn" was in Old English.
well-acquainted (adj.) Look up well-acquainted at Dictionary.com
1728, "having good acquaintance with," from well (adv.) + acquainted.
well-adjusted (adj.) Look up well-adjusted at Dictionary.com
1735, in reference to mechanisms, etc., from well (adv.) + past participle of adjust (v.). In reference to emotional balance, recorded from 1959.
well-balanced (adj.) Look up well-balanced at Dictionary.com
1620s, from well (adv.) + past participle of balance (v.).
well-behaved (adj.) Look up well-behaved at Dictionary.com
1590s, from well (adv.) + past participle of behave (v.).
well-being (n.) Look up well-being at Dictionary.com
1610s, from well (adv.) + gerundive of be.
well-beloved (adj.) Look up well-beloved at Dictionary.com
late 14c., from well (adv.) + beloved.
well-born (adj.) Look up well-born at Dictionary.com
Old English welboren; see well (adv.) + born.
well-bred (adj.) Look up well-bred at Dictionary.com
1590s, from well (adv.) + bred.
well-done (adj.) Look up well-done at Dictionary.com
c.1200, "wise, prudent," from well (adv.) + done. Meaning "thoroughly cooked," in reference to meat, is attested from 1747. Well done! as an exclamation of approval is recorded from mid-15c.
well-earned (adj.) Look up well-earned at Dictionary.com
1730, from well (adv.) + past participle of earn (v.).
well-endowed (adj.) Look up well-endowed at Dictionary.com
1680s, "with ample material endowments," from well (adv.) + past participle of endow (v.). Sexual sense is attested from 1951.
well-fed (adj.) Look up well-fed at Dictionary.com
mid-14c., from well (adv.) + past participle of feed (v.).
well-founded (adj.) Look up well-founded at Dictionary.com
late 14c., from well (adv.) + past participle of found (v.1).
well-heeled (adj.) Look up well-heeled at Dictionary.com
"well-off, having much money, in good circumstances;" also "well-equipped," 1872, American English slang (originally in the "money" sense), from well (adv.) + colloquial sense of heeled. "[A]pplied to a player at cards who has a good hand, to a person who possesses plenty of money, or to a man who is well armed" [Century Dictionary]. From 1817 in a literal sense, in reference to shoes.
well-hung (adj.) Look up well-hung at Dictionary.com
1610s, in male genital sense, from well (adv.) + hung (adj.).
well-informed (adj.) Look up well-informed at Dictionary.com
mid-15c., from well (adv.) + past participle of inform (v.).
well-intentioned (adj.) Look up well-intentioned at Dictionary.com
1590s, from well (adv.) + intentioned (see intention).
well-kept (adj.) Look up well-kept at Dictionary.com
c.1400, from well (adv.) + past participle of keep (v.).
well-known (adj.) Look up well-known at Dictionary.com
late 15c., from well (adv.) + past participle of know (v.).
well-mannered (adj.) Look up well-mannered at Dictionary.com
late 14c., "moral, virtuous," from well (adv.) + mannered. Meaning "with good manners" is from 1540s.
well-meaning (adj.) Look up well-meaning at Dictionary.com
late 14c., from well (adv.) + present participle of mean (v.).
well-meant (adj.) Look up well-meant at Dictionary.com
late 15c., from well (adv.) + past participle of mean (v.).
well-nigh (adv.) Look up well-nigh at Dictionary.com
Old English wel neah, from well (adv.) + nigh.
well-off (adj.) Look up well-off at Dictionary.com
1733, "comfortable," from well (adv.) + off. Meaning "prosperous, not poor" is recorded from 1849.
well-ordered (adj.) Look up well-ordered at Dictionary.com
c.1600, from well (adv.) + past participle of order (v.).
well-read (adj.) Look up well-read at Dictionary.com
1590s, from well (adv.) + read (adj.).
well-regulated (adj.) Look up well-regulated at Dictionary.com
1709 (Shaftsbury), from well (adv.) + past participle of regulate (v.).