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eleven: eleven: [OE] Originally, eleven and twelve seem to have meant literally ‘one over’ and ‘two over’. Eleven comes ultimately from a prehistoric Germanic *ainlif- (source also of German elf and Swedish elva) in which the first element *ainaz is ‘one’ and the second is probably related to English leave. The compound would thus have signified ‘one left (over ten)’, hence ‘ten plus one’.
=> leave, one
relevant: relevant: [16] Relevant comes ultimately from the present participle of Latin relevāre ‘raise’, source of English relief and relieve. The modern English sense ‘appropriate’ probably developed from a medieval application of relevāre to ‘take up’, hence ‘take possession of property’, which led to relevant being used as a legal term for ‘connected with’.
=> relief, relieve
television: television: [20] Television means etymologically ‘far vision’. Its first element, tele-, comes from Greek téle ‘far off’, a descendant of the same base as télos ‘end’ (source of English talisman and teleology). Other English compounds formed from it include telegraph [18], telegram [19], telepathy [19] (etymologically ‘far feeling’, coined by the psychologist Frederic Myers in 1882), telephone [19], telescope [17] (a word of Italian origin), and telex [20] (a blend of teleprinter and exchange). Television itself was coined in French, and was borrowed into English in 1907.

Of its abbreviations, telly dates from about 1940, TV from 1948.
=> talisman, teleology
elevate (v.): late 15c., "to raise above the usual position," from Latin elevatus, past participle of elevare "lift up, raise," figuratively, "to lighten, alleviate," from ex- "out" (see ex-) + levare "lighten, raise," from levis "light" in weight (see lever). Sense of "raise in rank or status" is from c. 1500. Moral or intellectual sense is from 1620s. Related: Elevated (which also was old slang for "drunk"); elevating.
elevation (n.): late 14c., "a rising, height of something, height to which something is elevated," from Old French elevation and directly from Latin elevationem (nominative elevatio) "a lifting up," noun of action from past participle stem of elevare "lift up, raise" (see elevate). Meaning "act of elevating" is from 1520s.
elevator (n.): 1640s, originally of muscles which raise a part of the body, from Latin elevator "one who raises up," agent noun from past participle stem of elevare (see elevate). As a name for a mechanical lift (originally for grain) attested from 1787. Elevator music is attested by 1963. Elevator as a lift for shoes is from 1940.
eleven (n.): c. 1200, elleovene, from Old English enleofan, endleofan, literally "one left" (over ten), from Proto-Germanic *ainlif- (compare Old Saxon elleban, Old Frisian andlova, Dutch elf, Old High German einlif, German elf, Old Norse ellifu, Gothic ainlif), a compound of *ain "one" (see one) + PIE *leikw- "leave, remain" (source of Greek leipein "to leave behind;" see relinquish).
FIREFLY: Give me a number from 1 to 10.
CHICOLINI: eleven!
FIREFLY: Right!
Viking survivors who escaped an Anglo-Saxon victory were daroþa laf "the leavings of spears," while hamora laf "the leavings of hammers" was an Old English kenning for "swords" (both from "The Battle of Brunanburgh"). Twelve reflects the same formation. Outside Germanic the only instance of this formation is in Lithuanian, which uses -lika "left over" and continues the series to 19 (vienio-lika "eleven," dvy-lika "twelve," try-lika "thirteen," keturio-lika "fourteen," etc.). Meaning "a team or side" in cricket or football is from 1743.
eleventh (adj.): late 14c., eleventhe, superseding earlier ellefte (c. 1300), enlefte (early 13c.), from Old English endleofta; see eleven + -th (1). Eleventh hour "last moment, just before it is too late" is in Old English, from the parable of the laborers in the vineyard (Matt. xx:1-16); as an adjective by 1829.
elevon (n.): 1945, from elevator + aileron.
irrelevance (n.): 1735, from irrelevant + -ance. Earlier in the same sense was irrelevancy (1590s).
irrelevant (adj.): 1680s, from assimilated form of in- (1) "not, opposite of" + relevant. Related: Irrelevantly.
mendelevium (n.): 1955, Modern Latin, in honor of Dmitri Ivanovich Mendeleev.
relevance (n.): 1733; see relevant + -ance. Related: Relevancy (1560s).
relevant (adj.): "pertinent to the matter at hand," 1550s, from Middle French relevant "depending upon," originally "helpful," from Medieval Latin relevantem (nominative relevans), from stem of Latin relevare "to lessen, lighten" (see relieve). Not generally used until after 1800.
releve (n.): 1825 as a dish; 1930 in ballet, from French relevé, 19th century verbal noun from past participle of relever (see relieve), so, literally "raised up."
televangelist (n.): 1973, from tele(vision) + evangelist. Earliest usages are in reference to Rex Humbard (television evangelist is from 1958).
televise (v.): 1927 back-formation from television, on model of other verbs from nouns ending in -(v)ision (such as revise). Related: Televised; televising.
television (n.): 1907, as a theoretical system to transmit moving images over telegraph or telephone wires; formed in English or borrowed from French télévision, from tele- + vision.
Television is not impossible in theory. In practice it would be very costly without being capable of serious application. But we do not want that. On that day when it will be possible to accelerate our methods of telephotography by at least ten times, which does not appear to be impossible in the future, we shall arrive at television with a hundred telegraph wires. Then the problem of sight at a distance will without doubt cease to be a chimera. ["Telegraphing Pictures" in "Windsor Magazine," 1907]
Other proposals for the name of a then-hypothetical technology for sending pictures over distance were telephote (1880) and televista (1904). The technology was developed in the 1920s and '30s. Nativized in German as Fernsehen. Shortened form TV is from 1948. Meaning "a television set" is from 1941. Meaning "television as a medium" is from 1927.
Television is the first truly democratic culture -- the first culture available to everyone and entirely governed by what the people want. The most terrifying thing is what people do want. [Clive Barnes, "New York Times," Dec. 30, 1969]