layup (n.) Look up layup at Dictionary.com
also lay-up, "temporary period out of work," 1927, from lay (v.) + up (adv.). Basketball shot so called from 1948.
laywoman (n.) Look up laywoman at Dictionary.com
1520s, from lay (adj.) + woman; probably modeled on layman.
lazar (n.) Look up lazar at Dictionary.com
"filthy beggar, leper," c. 1300, from Medieval Latin lazarus "leper," from the Biblical name (see Lazarus).
lazaretto (n.) Look up lazaretto at Dictionary.com
"house for reception of lepers and diseased poor persons," 1540s, from Italian lazareto "place set aside for performance of quarantine" (especially that of Venice, which received many ships from plague-infested districts in the East), from the Biblical proper name Lazarus. Meaning "building set apart for quarantine" is c. 1600 in English. The word in Italian was perhaps influenced by the name of another hospital in Venice, that associated with the church of Santa Maria di Nazaret.
Lazarus Look up Lazarus at Dictionary.com
Biblical character (Luke xvi:20), the poor man covered in sores; his name was extended in medieval usage to "any poor and visibly diseased person" (compare lazar, mid-14c., "one deformed and nauseous with filthy and pestilential diseases" [Johnson]). The name is from a Greek rendition of Hebrew El'azar, literally "God has helped."
laze (v.) Look up laze at Dictionary.com
1590s, back-formation from lazy. Related: Lazed; lazing.
lazily (adv.) Look up lazily at Dictionary.com
1580s, from lazy + -ly (2).
laziness (n.) Look up laziness at Dictionary.com
1570s, from lazy + -ness.
lazy (adj.) Look up lazy at Dictionary.com
1540s, laysy, of unknown origin. Replaced native slack, slothful, and idle as the main word expressing the notion of "averse to work." In 19c. thought to be from lay (v.) as tipsy from tip. Skeat is responsible for the prevailing modern view that it probably comes from Low German, from a source such as Middle Low German laisch "weak, feeble, tired," modern Low German läösig, early modern Dutch leuzig, all of which may go back to the PIE root *(s)leg- "slack." According to Weekley, the -z- sound disqualifies a connection with French lassé "tired" or German lassig "lazy, weary, tired." A supposed dialectal meaning "naught, bad," if it is the original sense, may tie the word to Old Norse lasenn "dilapidated," lasmøyrr "decrepit, fragile," root of Icelandic las-furða "ailing," las-leiki "ailment." Lazy Susan is from 1917. Grose ("Dictionary of the Vulgar Tongue," 1788) has Lazy Man's Load: "Lazy people frequently take up more than they can safely carry, to save the trouble of coming a second time."
lazybones (n.) Look up lazybones at Dictionary.com
1590s, from lazy + plural of bone (n.).
LCD Look up LCD at Dictionary.com
1973, initialism (acronym) from liquid crystal display, which is attested from 1968.
lea (n.) Look up lea at Dictionary.com
Old English leah "open field, meadow, piece of untilled ground," earlier læch, recorded in place names, from Proto-Germanic *laukhaz (cognates: Old High German loh "clearing," and probably also Flemish -loo, which forms the second element in Waterloo), from PIE *louko- "light place" (cognates: Sanskrit lokah "open space, free space, world," Latin lucus "grove, sacred grove, wood," Lithuanian laukas "open field, land"), perhaps from or related to *leuk- "to shine, be bright" (see light (n.)).
leach (v.) Look up leach at Dictionary.com
Old English leccan "to moisten, water, wet, irrigate," (see leak (v.)). The word disappears, then re-emerges late 18c. in a technological sense in reference to percolating liquids. Related: Leached; leaching.
leachate (n.) Look up leachate at Dictionary.com
1920, from leach + -ate (1).
lead (v.1) Look up lead at Dictionary.com
"to guide," Old English lædan "cause to go with one, lead, guide, conduct, carry; sprout forth; bring forth, pass (one's life)," causative of liðan "to travel," from Proto-Germanic *laidjan (cognates: Old Saxon lithan, Old Norse liða "to go," Old High German ga-lidan "to travel," Gothic ga-leiþan "to go"), from PIE *leit- "to go forth."

Meaning "to be in first place" is from late 14c. Sense in card playing is from 1670s. Related: Led; leading. Lead-off "commencement, beginning" attested from 1879; lead-in "introduction, opening" is from 1928.
lead (n.1) Look up lead at Dictionary.com
heavy metal, Old English lead, from West Germanic *loudhom (cognates: Old Frisian lad, Middle Dutch loot, Dutch lood "lead," German Lot "weight, plummet"). The name and the skill in using the metal seem to have been borrowed from the Celts (compare Old Irish luaide), probably from PIE root *plou(d)- "to flow."

Figurative of heaviness since at least early 14c. Black lead was an old name for "graphite," hence lead pencil (1680s) and the colloquial figurative phrase to have lead in one's pencil "be possessed of (especially male sexual) vigor," attested by 1902. Lead balloon "a failure," American English slang, attested by 1957 (as a type of something heavy that can be kept up only with effort, from 1904). Lead-footed "slow" is from 1896; opposite sense of "fast" emerged 1940s in trucker's jargon, from notion of a foot heavy on the gas pedal.
lead (n.2) Look up lead at Dictionary.com
c. 1300, "action of leading," from lead (v.1). Meaning "the front or leading place" is from 1560s. Johnson stigmatized it as "a low, despicable word." Sense in card-playing is from 1742; in theater, from 1831; in journalism, from 1912; in jazz bands, from 1934.
lead (v.2) Look up lead at Dictionary.com
early 15c., "to make of lead," from lead (n.1). Meaning "to cover with lead" is from mid-15c. Related: Leaded (early 13c.); leading.
lead-up (n.) Look up lead-up at Dictionary.com
1917, from lead (v.1) + up (adv.).
leaden (adj.) Look up leaden at Dictionary.com
"made of lead," Old English leaden, from lead (n.1) + -en (2). The figurative sense of "heavy, oppressive, dull" is attested by 1570s. Related: Leadenly; leadenness.
leader (n.) Look up leader at Dictionary.com
Old English lædere "one who leads," agent noun from lædan (see lead (v.)). As a title for the head of an authoritarian state, from 1918 (translating führer, Duce, caudillo, etc.). Meaning "writing or statement meant to begin a discussion or debate" is late 13c.; in modern use often short for leading article (1807) "opinion piece in a British newspaper" (leader in this sense attested from 1837).
leaderless (adj.) Look up leaderless at Dictionary.com
1590s, from leader (n.1) + -less. Related: Leaderlessly; leaderlessness.
leadership (n.) Look up leadership at Dictionary.com
1821, "position of a leader," from leader + -ship. Sense extended by late 19c. to "characteristics necessary to be a leader."
leading (n.1) Look up leading at Dictionary.com
"lead work; lead covering or frame of lead," mid-15c., from lead (n.1).
leading (n.2) Look up leading at Dictionary.com
mid-13c., "a bringing by force," from present participle of lead (v.1). Meaning "direction, guidance" is from late 14c. As an adjective, "directing, guiding."
leaf (v.) Look up leaf at Dictionary.com
"to turn over (the pages of a book)," 1660s, from leaf (n.). The notion of a book page also is in the phrase to turn over a (new) leaf (1570s). Related: Leafed; leaved; leafing.
leaf (n.) Look up leaf at Dictionary.com
Old English leaf "leaf of a plant; page of a book," from Proto-Germanic *laubaz (cognates: Old Saxon lof, Old Norse lauf, Old Frisian laf, Dutch loof, Old High German loub, German Laub "foliage, leaves," Gothic lauf), perhaps from PIE *leup- "to peel off, break off" (cognates: Lithuanian luobas, Old Church Slavonic lubu "bark, rind"). Extended 15c. to very thin sheets of metal (especially gold). Meaning "hinged flap on the side of a table" is from 1550s.
leafless (adj.) Look up leafless at Dictionary.com
1580s, from leaf (n.) + -less.
leaflet (n.) Look up leaflet at Dictionary.com
1787 as a term in botany; 1867 as a term in printing and publication; diminutive of leaf (n.) with -let.
A newspaperman asked the British authorities for a copy of the leaflets distributed in Germany by British airplanes. According to the London Daily Herald, his request was refused with the following answer: "Copies are not given out, as they might fall into enemy hands." ["The Living Age" magazine, Sept. 1939-Feb. 1940]
leafy (adj.) Look up leafy at Dictionary.com
1550s, from leaf (n.) + -y (2). Related: Leafily; leafiness.
league (n.1) Look up league at Dictionary.com
"alliance," mid-15c., ligg, from Middle French ligue "confederacy, league" (15c.), from Italian lega, from legare "to tie, to bind," from Latin ligare "to bind" (see ligament). Originally among nations, subsequently extended to political associations (1846) and sports associations (1879). League of Nations first attested 1917 (created 1919).
league (n.2) Look up league at Dictionary.com
distance of about three miles, late 14c., ultimately from Late Latin leuga (source also of French lieue, Spanish legua, Italian lega), said by Roman writers to be from Gaulish. A vague measure (perhaps originally an hour's hike) never in official use in England, where it is recorded more often in poetic than in practical writing.
league (v.) Look up league at Dictionary.com
"to form a league," 1610s, from league (n.1). Related: Leagued; leaguing.
leak (v.) Look up leak at Dictionary.com
"to let water in or out" [Johnson], late 14c., from Middle Dutch leken "to drip, to leak," or from Old Norse leka, both of them related to Old English leccan "to moisten" (which did not survive into Middle English), all from Proto-Germanic *lek- "deficiency" (cognates: Old High German lecchen "to become dry," German lechzen "to be parched with thirst"), from PIE root *leg- "to dribble, trickle." The figurative meaning "come to be known in spite of efforts at concealment" dates from at least 1832; transitive sense first recorded 1859. Related: Leaked; leaking.
leak (n.) Look up leak at Dictionary.com
late 15c., from leak (v.) or Old Norse cognate leki. Sense of "revelation of secret information" is from 1950. Meaning "act of urination" is attested from 1934 ("Tropic of Cancer"); but the verb meaning "to piss" is from 1590s: "Why, you will allow vs ne're a Iourden, and then we leake in your Chimney." ["I Hen. IV," II.i.22]
leakage (n.) Look up leakage at Dictionary.com
late 15c., from leak (v.) + -age.
leaky (adj.) Look up leaky at Dictionary.com
mid-15c., from leak (n.) + -y (2). Related: Leakiness.
leal (adj.) Look up leal at Dictionary.com
"loyal, faithful, honest, true," c. 1300, lele, surviving from Middle English as Northern English and Scottish form of loyal. The Land of the leal is Heaven, not Scotland.
lean (v.) Look up lean at Dictionary.com
c. 1200, from Old English hleonian "to bend, recline, lie down, rest," from Proto-Germanic *khlinen (cognates: Old Saxon hlinon, Old Frisian lena, Middle Dutch lenen, Dutch leunen, Old High German hlinen, German lehnen "to lean"), from PIE root *klei- "to lean, to incline" (cognates: Sanskrit srayati "leans," sritah "leaning;" Old Persian cay "to lean;" Lithuanian slyti "to slope," slieti "to lean;" Latin clinare "to lean, bend," clivus "declivity," inclinare "cause to bend," declinare "bend down, turn aside;" Greek klinein "to cause to slope, slant, incline;" Old Irish cloin "crooked, wrong;" Middle Irish cle, Welsh cledd "left," literally "slanting;" Welsh go-gledd "north," literally "left" -- for similar sense evolution, see Yemen, Benjamin, southpaw).

Meaning "to incline the body against something for support" is mid-13c. Figurative sense of "to trust for support" is from early 13c. Sense of "to lean toward mentally, to favor" is from late 14c. Related: Leaned; leaning. Colloquial lean on "put pressure on" (someone) is first recorded 1960.
lean (adj.) Look up lean at Dictionary.com
"thin, spare, with little flesh or fat," c. 1200, from Old English hlæne "lean, thin," possibly from hlænan "cause to lean or bend," from Proto-Germanic *khlainijan, which would connect it to Old English hleonian (see lean (v.)). But perhaps rather, according to OED, from a PIE *qloinio- (with cognates in Lithuanian klynas "scrap, fragment," Lettish kleins "feeble"). Extended and figurative senses from early 14c. The noun meaning "lean animals or persons" is from c. 1200, from the adjective.
lean (n.) Look up lean at Dictionary.com
"action or state of leaning," 1776, from lean (v.).
lean-to (n.) Look up lean-to at Dictionary.com
"building whose rafters pitch against another building or wall," mid-15c., from lean (v.) + to.
Leander Look up Leander at Dictionary.com
youth of Abydos, lover of Hero, who swam nightly across the Hellespont to visit her, from Greek Leiandros, literally "lion-man," from leon "lion" + aner (genitive andros) "man" (see anthropo-).
leanness (n.) Look up leanness at Dictionary.com
Old English hlænnesse; see lean (adj.) + -ness.
leap (v.) Look up leap at Dictionary.com
c. 1200, from Old English hleapan "to jump, run, leap" (class VII strong verb; past tense hleop, past participle hleapen), from Proto-Germanic *hlaupan (cognates: Old Saxon hlopan, Old Norse hlaupa, Old Frisian hlapa, Dutch lopen, Old High German hlouffan, German laufen "to run," Gothic us-hlaupan "to jump up"), of uncertain origin, with no known cognates beyond Germanic. Leap-frog, the children's game, is attested by that name from 1590s; figurative use by 1704.
First loke and aftirward lepe [proverb recorded from mid-15c.]
Related: Leaped; leaping.
leap (n.) Look up leap at Dictionary.com
c. 1200, from Old English hliep, hlyp (West Saxon), *hlep (Mercian, Northumbrian) "a leap, bound, spring, sudden movement; thing to leap from;" common Germanic (cognates: Old Frisian hlep, Dutch loop, Old High German hlouf, German lauf); from the root of leap (v.). Leaps has been paired with bounds since at least 1720.
leap year (n.) Look up leap year at Dictionary.com
late 14c., from leap (v.) + year. So called from its causing fixed festival days, which normally advance one weekday per year, to "leap" ahead one day in the week.
learn (v.) Look up learn at Dictionary.com
Old English leornian "to get knowledge, be cultivated, study, read, think about," from Proto-Germanic *liznojan (cognates: Old Frisian lernia, Middle Dutch leeren, Dutch leren, Old High German lernen, German lernen "to learn," Gothic lais "I know"), with a base sense of "to follow or find the track," from PIE *leis- (1) "track, furrow." Related to German Gleis "track," and to Old English læst "sole of the foot" (see last (n.)).

The transitive sense (He learned me how to read), now vulgar, was acceptable from c. 1200 until early 19c., from Old English læran "to teach" (cognate with Dutch leren, German lehren "to teach," literally "to make known;" see lore), and is preserved in past participle adjective learned "having knowledge gained by study." Related: Learning.
learnable (adj.) Look up learnable at Dictionary.com
1620s, from learn + -able.
learned (adj.) Look up learned at Dictionary.com
"having knowledge gained by study," mid-14c., past participle adjective from learn (v.) in former transitive sense. Related: Learnedly; learnedness.