spline (n.) Look up spline at Dictionary.com
long, thin piece of wood or metal, 1756, from East Anglian dialect, of uncertain origin. Perhaps from older Danish splind or North Frisian splinj. Especially one fitted into a groove on a wheel and a shaft to keep them revolving together (1864).
splint (n.) Look up splint at Dictionary.com
c. 1300, "overlapping plate or strip in armor" (made of metal splints), probably from Middle Low German splinte, splente "thin piece of iron," related to Middle Dutch splinte "splint," probably literally "thin piece cut off," and from a Germanic offshoot of PIE *(s)plei- "to split, splice" (see flint). Cognate with Danish splint "splinter," Swedish splint "wooden peg, wedge." Meaning "slender, flexible slip of wood" is recorded from early 14c.; specific surgical sense is attested from c. 1400.
splinter (n.) Look up splinter at Dictionary.com
early 14c., from Middle Dutch splinter, splenter "a splinter," related to splinte (see splint). The adjective (in splinter party, etc.) is first recorded 1935, from the noun.
splinter (v.) Look up splinter at Dictionary.com
1580s (transitive), from splinter (n.). Figurative sense from c. 1600. Intransitive use from 1620s. Middle English had splinder (v.) "to shatter" (of a spear, etc.), mid-15c. Related: Splintered; splintering.
split (v.) Look up split at Dictionary.com
1580s (transitive and intransitive), not found in Middle English, probably from a Low German source such as Middle Dutch splitten, from Proto-Germanic *spl(e)it- (cognates: Danish and Frisian splitte, Old Frisian splita, German spleißen "to split"), from PIE *(s)plei- "to split, splice" (see flint).

U.S. slang meaning "leave, depart" first recorded 1954. Of couples, "to separate, to divorce" from 1942. To split the difference is suggested from 1715; to split (one's) ticket in the U.S. political sense is attested from 1842. To split hairs "make too-nice distinctions" is from 1670s (split a hair). Splitting image "exact likeness" is from 1880. To split the atom is from 1909.
split (adj.) Look up split at Dictionary.com
1640s, past participle adjective from split (v.). Split decision is from 1946 of court rulings, 1951 in boxing. Split shift is from 1904. Split personality first attested 1899.
split (n.) Look up split at Dictionary.com
1590s, "narrow cleft, crack, fissure," from split (v.). Meaning "piece of wood formed by splitting" is from 1610s. Meaning "an act of separation, a divorce" is from 1729. From 1861 as the name of the acrobatic feat. Meaning "a drink composed of two liquors" is from 1882; that of "sweet dish of sliced fruit with ice cream" is attested from 1920, American English. Slang meaning "share of the take" is from 1889. Meaning "a draw in a double-header" is from 1920.
split-level (adj.) Look up split-level at Dictionary.com
1951 as a type of building plan, from split (adj.) + level (n.). As a noun from 1954, short for split-level house, etc.
split-screen (adj.) Look up split-screen at Dictionary.com
1949, from noun use (1946); see split (adj.) + screen (n.).
split-second (n.) Look up split-second at Dictionary.com
1884, originally the name of a type of stopwatch with two second hands that could be stopped independently. Meaning "a fraction of a second" is from 1912, from split (adj.) + second (n.1); adjectival meaning "occurring in a fraction of a second" is from 1946.
splosh (v.) Look up splosh at Dictionary.com
1889 [in Farmer, who calls it "A New England variant of splash"], ultimately imitative. Perhaps influenced by splish-splosh "sound made by feet walking through wet" (1881). Related: Sploshed; sploshing.
splotch (n.) Look up splotch at Dictionary.com
c. 1600, "a broad, ill-defined spot," perhaps a blend of spot, blot, and/or botch. Old English had splott "spot, blot; patch of land." Related: Splotchy; splotchiness.
splurge (n.) Look up splurge at Dictionary.com
1828, "ostentatious display," American English, of uncertain origin; originally among the class of words considered characteristic of "Western" (i.e. Kentucky) dialect. Perhaps a blend of splash and surge. The meaning "extravagant indulgence in spending" is first recorded 1928.
splurge (v.) Look up splurge at Dictionary.com
"to make an ostentatious display, to put on a splurge" (in the older sense of the noun), by 1843, from splurge (n.). Thornton's "American Glossary" has an 1848 citation defining splurge (v.) as "to expatiate at large, to appeal to broad and general principles." Meaning "to spend extravagantly" is by 1934. Related: Splurged; splurging.
splutter (n.) Look up splutter at Dictionary.com
1670s, perhaps a variant of sputter, intensified by the consonant cluster of splash, splatter, etc.
splutter (v.) Look up splutter at Dictionary.com
1728, from splutter (n.). Related: Spluttered; spluttering.
Spock Look up Spock at Dictionary.com
half-alien character in the "Star Trek" U.S. entertainment franchise, developed and named 1964 by series creator Gene Roddenberry, who later said he was searching for an alien-sounding word and not thinking of U.S. physician and child-care specialist Benjamin M. Spock (1903-1998), whose name is of Dutch origin. The doctor wrote the enormously popular "Common Sense Book of Baby and Child Care" (1946) and is the source of the first element in Spock-marked (1967), defined in OED as "(Adversely) affected by an upbringing held to be in accordance with the principles of Dr. Spock ...."
spode (n.) Look up spode at Dictionary.com
fine sort of porcelain, 1869, named for first maker, Josiah Spode (1754-1827), potter in Stoke-on-Trent, England.
spodomancy (n.) Look up spodomancy at Dictionary.com
"divination by ashes," 1836, from Greek spodos "wood ashes, embers," of uncertain origin, + -mancy. Related: Spodomantic.
spoil (v.) Look up spoil at Dictionary.com
c. 1300, "to strip (someone) of clothes, strip a slain enemy," from Old French espillier "to strip, plunder, pillage," from Latin spoliare "to strip, uncover, lay bare; strip of clothing, rob, plunder, pillage," from spolia, plural of spolium "arms taken from an enemy, booty;" originally "skin stripped from a killed animal," from PIE *spol-yo-, perhaps from root *spel- "to split, to break off" (see spill (v.)).

From late 14c. in English as "strip with violence, rob, pillage, plunder, dispossess; impoverish with excessive taxation." Used c. 1400 as the verb to describe Christ's harrowing of Hell. Sense of "destroy, ruin, damage so as to render useless" is from 1560s; that of "to over-indulge" (a child, etc.) is from 1640s (implied in spoiled). Intransitive sense of "become tainted, go bad, lose freshness" is from 1690s. To be spoiling for (a fight, etc.) is from 1865, from notion that one will "spoil" if he doesn't get it.
spoil (n.) Look up spoil at Dictionary.com
"booty, goods captured in time of war," mid-14c., spoils (collective singular), from spoil (v.) or else from Old French espoille "booty, spoil," from the verb in French, and in part from Latin spolium. Also from the Latin noun are Spanish espolio, Italian spoglio.

Transferred sense of "that which has been acquired by special effort" is from 1750. Spoils has stood cynically for "public offices, etc." aince at least 1770. Spoils system in U.S. politics attested by 1839, commonly associated with the administration of President Andrew Jackson, on the notion of "to the victor belongs the spoils."
spoil-sport (n.) Look up spoil-sport at Dictionary.com
1786, from verbal phrase (attested by 1711); see spoil (v.) + sport (n.).
spoiled (adj.) Look up spoiled at Dictionary.com
"over-indulged," 1640s, past participle adjective from spoil (v.).
spoiler (n.) Look up spoiler at Dictionary.com
1530s, "one who robs or plunders," agent noun from spoil (v.). Meaning "one who mars another's chance at victory" is attested from 1950 in U.S. politics, perhaps from boxing. Aeronautics sense is from 1928, because the flap thwarts the "lift" on the plane; transferred to structures serving a similar purpose on speedboats (1957) and motor vehicles (1963). Meaning "information about the plot of a movie, etc., which might 'spoil' it for one who has not seen it" is attested by 1982.
spoke (n.) Look up spoke at Dictionary.com
"radius of a wheel," Old English spaca "spoke of a wheel, radius," related to spicing "large nail," from Proto-Germanic *spaikon (cognates: Old Saxon speca, Old Frisian spake, Dutch spaak, Old High German speicha, German speiche "spoke"), of uncertain origin, probably from PIE *spei- "sharp point" (see spike (n.1)).
spoken (adj.) Look up spoken at Dictionary.com
"uttered, oral" (as opposed to written), 1837, past participle adjective from speak (v.).
spokesman (n.) Look up spokesman at Dictionary.com
1510s, "an interpreter," 1530s in the sense of "person who speaks for another or others." Irregular formation from spoke, past tense of speak (actually a back-formation from spoken) + man (n.). Perhaps on analogy of craftsman. Spokeswoman is from 1650s; spokesperson is from 1972; spokesmodel is attested from 1990.
spoliation (n.) Look up spoliation at Dictionary.com
"robbery, plunder," c. 1400, from Latin spoliationem (nominative spoliatio) "a robbing, plundering, pillaging," noun of action from past participle stem of spoliare "to plunder, rob" (see spoil (v.)).
spondee (n.) Look up spondee at Dictionary.com
"metrical foot consisting of two long syllables," late 14c., from Old French spondee (14c.), from Latin spondeus, from Greek spondeios (pous), the name of the meter originally used in chants accompanying libations, from sponde "solemn libation, a drink-offering," related to spendein "make a drink offering," from PIE root *spend- "to make an offering, perform a rite," hence "to engage oneself by a ritual act" (cognates: Latin spondere "to engage oneself, promise," Hittite shipantahhi "I pour out a libation, I sacrifice"). Related: Spondaic.
spondulicks (n.) Look up spondulicks at Dictionary.com
1856, American English slang, "money, cash," of unknown origin, said to be from Greek spondylikos, from spondylos, a seashell used as currency (the Greek word means literally "vertebra"). "[U]sed by Mark Twain and by O. Henry and since then adopted into British English" [Barnhart], where it survived after having faded in the U.S.
spondyle (n.) Look up spondyle at Dictionary.com
"a vertebra," from French spondyle (14c.), from Latin spondylus, from Greek spondylos "vertebra" (see spondylo-).
spondylitis (n.) Look up spondylitis at Dictionary.com
"inflammation of the vertebrae," 1837, Modern Latin, from Latin spondylus, from Greek spondylos (see spondylo-) + -itis "inflammation."
spondylo- Look up spondylo- at Dictionary.com
before vowels spondyl-, comb form meaning "vertebrae," from Greek spondylos "a vertebra," in plural "the backbone," variant of sphondylos, of uncertain origin.
spondylolisthesis (n.) Look up spondylolisthesis at Dictionary.com
medical Latin, from Greek spondylos (see spondylo-) + oliothesis "dislocation, slipping."
spondylosis (n.) Look up spondylosis at Dictionary.com
1885, from Greek spondylos "vertebra" (see spondylo-) + -osis.
sponge (n.) Look up sponge at Dictionary.com
Old English sponge, spunge, from Latin spongia "a sponge," also "sea animal from which a sponge comes," from Greek spongia, related to spongos "sponge," of unknown origin. "Probably a loanword from a non-IE language, borrowed independently into Greek, Latin and Armenian in a form *sphong-" [de Vaan]. The Latin word is the source of Old Saxon spunsia, Middle Dutch spongie, Old French esponge, Spanish esponja, Italian spugna.

In English in reference to the marine animal from 1530s. To throw in the sponge "quit, submit" (1860) is from prizefighting, in reference to the sponges used to cleanse the faces of combatants between rounds (compare later throw in the towel). Sponge-cake is attested from 1808.
sponge (v.) Look up sponge at Dictionary.com
late 14c., "to soak up with a sponge," also (transitive) "to cleanse or wipe with a sponge," from sponge (n.). The slang sense of "to live in a parasitic manner, live at the expense of others" is attested from 1670s; sponger (n.) in this sense is from 1670s. Originally it was the victim who was the sponge (c. 1600), because he or she was being "squeezed." Intransitive sense "dive for sponges" is from 1881. Related: Sponged; sponging.
sponger (n.) Look up sponger at Dictionary.com
1670s, "parasite," agent noun from sponge (v.) in figurative sense. As a job on a cannon crew, by 1828.
spongiform (adj.) Look up spongiform at Dictionary.com
"resembling a sponge," 1774, from Latin spongia "sponge" (see sponge (n.)) + forma "form, shape" (see form (n.)).
spongy (adj.) Look up spongy at Dictionary.com
"soft, elastic," 1530s, from sponge (n.) + -y (2). Of hard material (especially bone) "open, porous," 1590s. Related: Sponginess.
sponsor (n.) Look up sponsor at Dictionary.com
1650s, from Late Latin sponsor "sponsor in baptism," in Latin "a surety, guarantee, bondsman," from sponsus, past participle of spondere "give assurance, promise solemnly" (see spondee). Sense of "person who pays for a radio (or, after 1947, TV) program" is first recorded 1931.
sponsor (v.) Look up sponsor at Dictionary.com
1884, "to favor or support," from sponsor (n.). Commercial broadcasting sense is from 1931. Related: Sponsored; sponsoring.
sponsorship (n.) Look up sponsorship at Dictionary.com
1753, from sponsor (n.) + -ship.
spontaneity (n.) Look up spontaneity at Dictionary.com
1650s, from French spontanéité or a native formation from spontaneous + -ity.
spontaneous (adj.) Look up spontaneous at Dictionary.com
1650s, "occurring without external stimulus," from Late Latin spontaneus "willing, of one's free will," from Latin (sua) sponte "of one's own accord, willingly;" of uncertain origin. Related: Spontaneously; spontaneousness. Used earlier of persons and characters, with a sense "acting of one's own accord" (c. 1200). Spontaneous combustion first attested 1795. Spontaneous generation (the phrase, not the feat) attested from 1650s.
spoof (n.) Look up spoof at Dictionary.com
"hoax, deception," 1889, from spouf (1884), name of a game invented by British comedian Arthur Roberts (1852-1933). Sense of "a parody, satirical skit or play" is first recorded 1958, from verb in this sense (1914).
spoof (v.) Look up spoof at Dictionary.com
1889, "to hoax, deceive, trick;" from 1914 as "to parody or satirize;" see spoof (n.). Related: Spoofed; spoofing.
spook (n.) Look up spook at Dictionary.com
1801, "spectre, apparition, ghost," from Dutch spook, from Middle Dutch spooc "spook, ghost," from a common Germanic source (German Spuk "ghost, apparition," Middle Low German spok "spook," Swedish spok "scarecrow," Norwegian spjok "ghost, specter," Danish spøg "joke"), of unknown origin. According to Klein's sources, possible outside connections include Lettish spigana "dragon, witch," spiganis "will o' the wisp," Lithuanian spingu, spingeti "to shine," Old Prussian spanksti "spark."

Meaning "undercover agent" is attested from 1942. The derogatory racial sense of "black person" is attested from 1940s, perhaps from notion of dark skin being difficult to see at night. Black pilots trained at Tuskegee Institute during World War II called themselves the Spookwaffe.
spook (v.) Look up spook at Dictionary.com
1867, "to walk or act like a ghost," from spook (n.). Meaning "to unnerve" is from 1935. Related: Spooked; spooking.
spooky (adj.) Look up spooky at Dictionary.com
1854, "frightening;" 1926, "easily frightened," from spook (n. or v.) + -y (2). Related: Spookily; spookiness.