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Lupercalia (n.)[Lupercalia 词源字典]: Roman festival held Feb. 15, in honor of Lupercus, god (identified with Lycean Pan) who had a grotto at the foot of the Palatine Hill, from Latin Lupercalia (plural), from Lupercalis "pertaining to Lupercus," whose name derives from lupus "wolf" (see wolf (n.)).[Lupercalia etymology, Lupercalia origin, 英语词源]
lupin (n.): plant of the genus lupinus, late 14c., from Latin lupinus, name of the plant, noun use of an adjective meaning "of a wolf" (see lupine). The reason for association with the animal is unclear; perhaps it was so called because of a belief that the plants were harmful to soil (compare lupus).
lupine (adj.): "wolf-like," 1650s, from French lupine "wolf-like," from Latin lupinus "of the wolf," from lupus "wolf" (see wolf (n.)).
lupus (n.): late 14c., used of several diseases that cause ulcerations of the skin, from Medieval Latin lupus, from Latin lupus "wolf" (see wolf (n.)), apparently because it "devours" the affected part.
lurch (n.1): "sudden pitch to one side," 1784, from earlier lee-larches (1765), a nautical term for "the sudden roll which a ship makes to lee-ward in a high sea, when a large wave strikes her, and bears her weather-side violently up, which depresses the other in proportion" ["Complete Dictionary of Arts and Sciences," London 1765]; perhaps from French lacher "to let go," from Latin laxus (see lax).
When a Ship is brought by the Lee, it is commonly occaſsioned by a large Sea, and by the Neglect of the Helm's-man. When the Wind is two or three Points on the Quarter, the Ship taking a Lurch, brings the Wind on the other Side, and lays the Sails all dead to the Maſt; as the Yards are braced up, ſhe then having no Way, and the Helm being of no Service, I would therefore brace about the Head ſails ſharp the other Way .... [John Hamilton Moore, Practical Navigator, 8th ed., 1784]
lurch (n.2): "predicament," 1580s, from Middle English lurch (v.) "to beat in a game of skill (often by a great many points)," mid-14c., probably literally "to make a complete victory in lorche," a game akin to backgammon, from Old French lourche. The game name is perhaps related to Middle English lurken, lorken "to lie hidden, lie in ambush," or it may be adopted into French from Middle High German lurz "left," also "wrong."
lurch (v.): 1821, from lurch (n.1). Related: Lurched; lurching.
lure (n.): early 14c., "something which allures or entices, an attraction" (a figurative use), also "bait for recalling hawks," from Anglo-French lure, Old French loirre "device used to recall hawks, lure," from Frankish *loþr or some other Germanic source, from Proto-Germanic *lothran "to call" (cognates: Middle High German luoder, Middle Low German loder "lure, bait," German Luder "lure, deceit, bait;" also Old English laþian "to call, invite," German laden).

Originally a bunch of feathers on a long cord, from which the hawk is fed during its training. Used of means of alluring other animals (especially fish) from c. 1700. Technically, bait is something the animal can eat; lure is a more general term. Also in 15c. a collective word for a group of young women.
lure (v.): late 14c., of hawks, also of persons, from lure (n.). Related: Lured; luring.
lurid (adj.): 1650s, "pale," from Latin luridus "pale yellow, ghastly," of uncertain origin, perhaps cognate with Greek khloros (see Chloe). Meaning "glowing in the darkness" is from 1727. The figurative sense of "sensational" is first attested 1850. Related: Luridly.
lurk (v.): c. 1300, lurken "to hide, lie hidden," probably from Scandinavian (compare dialectal Norwegian lurka "to sneak away," dialectal Swedish lurka "to be slow in one's work"), perhaps ultimately related to Middle English luren "to frown, lurk" (see lower (v.2)). Related: Lurked; lurking.
lurker (n.): "one who lurks," early 14c., agent noun from lurk (v.).
luscious (adj.): late 15c., perhaps a variant (with form perhaps influenced by Old French luxure, lusure) of Middle English licius "delicious" (c. 1400), which is perhaps a shortening of delicious, but OED is against this. Related: Lusciously; lusciousness.
lush (adj.): mid-15c., "lax, flaccid, soft, tender," from Old French lasche "soft, succulent," from laschier "loosen," from Late Latin laxicare "become shaky," related to Latin laxare "loosen," from laxus "loose" (see lax). Sense of "luxuriant in growth" is first attested c. 1600, in Shakespeare. Applied to colors since 1744. Related: Lushly; lushness.
lush (n.): "drunkard," 1890, from earlier (1790) slang meaning "liquor" (especially in phrase lush ken "alehouse"); perhaps a humorous use of lush (adj.) or from Romany or Shelta (tinkers' jargon).
LUSHEY. Drunk. The rolling kiddeys had a spree, and got bloody lushey; the dashing lads went on a party of pleasure, and got very drunk. ["Dictionary of Buckish Slang, University Wit, and Pickpocket Eloquence," London, 1811]
Lusitania: Latin name of a region roughly corresponding to modern Portugal; in modern use, allusive or poetic for "Portugal." The Cunard ocean liner (sister ship of the Mauretania and Aquitania, also named after Roman Atlantic coastal provinces) was launched in 1906, torpedoed and sunk by German submarine U-20 on May 7, 1915.
lusory (adj.): 1650s, from Latin lusorius "belonging to a player," from lusor "player," from stem of ludere "to play" (see ludicrous). Related: Lusorious.
lust (n.): Old English lust "desire, appetite, pleasure; sensuous appetite," from Proto-Germanic *lustuz (cognates: Old Saxon, Old Frisian, Dutch, German lust, Old Norse lyst, Gothic lustus "pleasure, desire, lust"), from PIE *las- "to be eager, wanton, or unruly" (cognates: Latin lascivus "wanton, playful, lustful;" see lascivious).

In Middle English, "any source of pleasure or delight," also "an appetite," also "a liking for a person," also "fertility" (of soil). Sense of "sinful sexual desire, degrading animal passion" (now the main meaning) developed in late Old English from the word's use in Bible translations (such as lusts of the flesh to render Latin concupiscentia carnis [I John ii:16]); the cognate words in other Germanic languages tend still to mean simply "pleasure."
lust (v.): c. 1200, "to wish, to desire," from lust (n.) and Old English lystan (see list (v.4)). Sense of "to have a strong sexual desire (for or after)" is first attested 1520s in biblical use. Related: Lusted; lusting.
luster (n.1): "gloss, radiance," 1520s, from Middle French lustre "gloss, radiance" (14c.), common Romanic (cognates: Spanish and Portuguese lustre, Rumanian lustru, Italian lustro "splendor, brilliancy"), from Latin lustrare "spread light over, brighten, illumine," related to lucere "shine," lux "light" (see light (n.)).