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Origin and history of *leuk-

*leuk-

Proto-Indo-European root meaning "light, brightness."

It might form all or part of: allumette; elucidate; illumination; illustration; lea; leukemia; leuko-; light (n.) "brightness, radiant energy;" lightning; limn; link (n.2) "torch of pitch, tow, etc.;" lucent; lucid; Lucifer; luciferase; luciferous; lucifugous; lucubrate; lucubration; luculent; lumen; Luminal; luminary; luminate; luminescence; luminous; luna; lunacy; lunar; Lunarian; lunate; lunation; lunatic; lune; lunette; luni-; luster; lustrum; lux; pellucid; sublunary; translucent.

It might also be the source of: Sanskrit rocate "shines;" Armenian lois "light," lusin "moon;" Greek leukos "bright, shining, white;" Latin lucere "to shine," lux "light," lucidus "clear;" Old Church Slavonic luci "light;" Lithuanian laukas "pale;" Welsh llug "gleam, glimmer;" Old Irish loche "lightning," luchair "brightness;" Hittite lukezi "is bright;" Old English leht, leoht "light, daylight; spiritual illumination," German Licht, Gothic liuhaþ "light."

Entries linking to *leuk-

allumette(n.)

"match for lighting," 1848, from French allumette "a match," from allumer "to light, kindle," from Old French alluminer, from Latin ad "to" (see ad-) + luminare "to shine," from Latin lumen (genitive luminis) "light" (from suffixed form of PIE root *leuk- "light, brightness").

elucidate(v.)

"make clear or manifest, throw light upon, explain, render intelligible," 1560s, perhaps via French élucider (15c.) or directly from Late Latin elucidatus, past participle of elucidare "make light or clear," from assimilated form of ex "out, away" (see ex-) + lucidus "light, bright, clear," figuratively "perspicuous, lucid, clear," from lucere "to shine" (from PIE root *leuk- "to shine, be bright"). Related: Elucidated; elucidates; elucidating.

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illumination
late 14c., "spiritual enlightenment," from Late Latin illuminationem (nominative illuminatio), noun of action from past participle stem of Latin illuminare "to throw into light, make bright, light up;" figuratively, in rhetoric, "to set off, illustrate," from assimilated form of
illustration
c. 1400, "a shining;" early 15c., "a manifestation;" mid-15c., "a spiritual illumination," from Old French illustration "apparition, appearance" (13c.) and directly from Latin illustrationem (nominative illustratio) "vivid representation" (in writing), literally "an enlightening,
lea
Old English leah "open field, meadow, piece of untilled grassy ground," earlier læch, preserved in place names, from Proto-Germanic *lauhaz (source also of Old High German loh "clearing," and probably also Flemish -loo, which forms the second element in Waterloo), from PIE *louko
luke
obsolete except in lukewarm (late 14c.), from Middle English leuk "tepid" (c. 1200), a word of uncertain origin, perhaps...from an unrecorded Old English *hleoc (cognate with Middle Dutch or Old Frisian leuk "tepid, weak"), an unexplained variant...
lucus a non lucendo
Modern scholarship, however, concludes that lucus and lucere probably do come both from the same PIE root (*leuk-) meaning...
light
Frisian liacht, Middle Dutch lucht, Dutch licht, Old High German lioht, German Licht, Gothic liuhaþ "light"), from PIE root *leuk...
toast
"to brown with heat," late 14c., from Old French toster "to toast, to grill, roast, burn" (12c.), from Vulgar Latin *tostare (source of Italian tostare, Spanish tostar), frequentative of Latin torrere (past participle tostus) "to parch," from PIE root *ters- "to dry." Related: To
strange
c. 1300, straunge, "from elsewhere, foreign, of another country; unknown, unfamiliar, not belonging to the place where found," also of a country, "unfamiliar, unknown, remote," from Old French estrange "foreign, alien, unusual, unfamiliar, curious; distant; inhospitable; estrange
epic
1580s, "pertaining to or constituting a lengthy heroic poem," via French épique or directly from Latin epicus, from Greek epikos, from epos "a word; a tale, story; promise, prophecy, proverb; poetry in heroic verse" (from PIE root *wekw- "to speak"). Extended sense of "grand, her
abyss
late 14c. in Latin form abyssus, "depths of the earth or sea; primordial chaos;" early 14c. as abime "depths of the earth or sea; bottomless pit, Hell" (via Old French; see abysm). Both are from Late Latin abyssus "bottomless pit," from Greek abyssos (limnē) "bottomless (pool),"

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