late 15c., "one who fails to perform a duty or discharge an obligation," also, generally, "an offender against the law," a noun use from Latin delinquentum (nominative delinquens), present participle of delinquere "to fail; be wanting, fall short; do wrong, transgress, offend," from de- "completely" (see de-) + linquere "to leave" (from PIE root *leikw- "to leave"). As an adjective, "failing or neglectful in duty," from c. 1600 in English.

1640s, "left, abandoned by the owner or guardian," from Latin derelictus "solitary, deserted," past participle of dereliquere "to abandon, forsake, desert," from de- "entirely" (see de-) + relinquere "leave behind, forsake, abandon, give up," from re- "back" (see re-) + linquere "to leave," from PIE root *leikw- "to leave."

Originally especially of vessels abandoned at sea or stranded on shore. Of persons, "unfaithful, neglectful of responsibility," by 1864. As a noun, "property which is abandoned," from 1660s. As "person abandoned or forsaken," 1728.

"interception or obscuration of the light of the sun, moon, or other heavenly body by the intervention of another heavenly body," c. 1300, from Old French eclipse "eclipse, darkness" (12c.), from Latin eclipsis, from Greek ekleipsis "an eclipse; an abandonment," literally "a failing, forsaking," from ekleipein "to forsake a usual place, fail to appear, be eclipsed," from ek "out" (see ex-) + leipein "to leave" (from PIE root *leikw- "to leave"). Compare ellipsis, ecliptic.

"1 more than ten; the number which is one more than ten; a symbol representing this number;" 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) + from PIE root *leikw- "to leave."

FIREFLY: Give me a number from 1 to 10.

CHICOLINI: eleven!

FIREFLY: Right!

["Duck Soup"]

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 Brunanburh"). 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 (vienuo-lika "eleven," dvy-lika "twelve," try-lika "thirteen," keturio-lika "fourteen," etc.). Meaning "a team or side" in cricket or football is from 1743.

1753, from French ellipse (17c.), from Latin ellipsis "ellipse," also, "a falling short, deficit," from Greek elleipsis (see ellipsis). So called because the conic section of the cutting plane makes a smaller angle with the base than does the side of the cone, hence, a "falling short." The Greek word was first applied by Apollonius of Perga (3c. B.C.E.). to the curve which previously had been called the section of the acute-angled cone, but the word earlier had been technically applied to a rectangle one of whose sides coincides with a part of a given line (Euclid, VI. 27).

1560s, "an ellipse" in geometry, from Latin ellipsis, from Greek elleipsis "a falling short, defect, ellipse in grammar," noun of action from elleipein "to fall short, leave out," from en- "in" (see en- (1)) + leipein "to leave" (from PIE root *leikw- "to leave").

Grammatical and rhetorical sense in English first recorded 1610s: "a figure of syntax in which a part of a sentence or phrase is used for the whole, by the omission of one or more words, leaving the full form to be understood or completed by the reader or hearer."

In printing, "a mark or marks denoting the omission of letters, words, or sentences," by 1867. Dashes, asterisks, and period have been used to indicate it. In reading aloud, a short pause was proper at a grammatical ellipsis in the writing.

WHEN a word or words are omitted by the figure ellipsis, a pause is necessary where the ellipsis occurs. [Robert James Ball, "The Academic Cicero; or Exercises in Modern Oratory," Dublin, 1823] 

Probably the association of the typographical symbol with a pause in speaking is why 20c. writers began to use the three periods to denote a pause or an interruption in dialogue, creating a potential confusion noted by 1939. Related: Ellipticity.

"pertaining to an ellipse; having the form of an ellipse," 1726, from Greek elleiptikos "pertaining to an ellipse," from elleipein "to fall short, leave out" (see ellipsis). Mostly in technical use; the common word is elliptical.

"writing which avoids all words containing a particular letter" (an ancient literary pastime; in English typically -e-), 1711, abstracted from Greek lipogrammatikos, literally "wanting a letter," from stem of leipein "to leave, be lacking" (from PIE root *leikw- "to leave") + gramma "a letter, character" (see -gram).

If Youth, throughout all history, had had a champion to stand up for it; to show a doubting world that a child can think; and, possibly, do it practically, you wouldn't constantly run across folks today who claim that "a child don't know anything." A child's brain starts functioning at birth; and has, amongst its many infant convolutions, thousands of dormant atoms, into which God has put a mystic possibility for noticing an adult's act, and figuring out its purport. [Ernest Vincent Wright, "Gadsby: A Story of Over 50,000 Words without Using the Letter 'e'," Los Angeles: 1939]

late 12c., "that which is lent or owning, a thing furnished on promise of future return," also "a gift or reward from a superior, a gift of God," from Old Norse lan "loan," from Proto-Germanic *laikhwniz (source also of Old Frisian len "thing lent," Middle Dutch lene, Dutch leen "loan, fief," Old High German lehan, German Lehn "fief, feudal tenure"), originally "to let have, to leave (to someone)," from PIE *loikw-nes-, suffixed form of root *leikw- "to leave."

The Norse word also is cognate with Old English læn "gift," which according to OED did not survive into Middle English, but its derived verb lænan is the source of lend (v.). From early 15c. as "a contribution to public finances" (ostensibly voluntary but often coerced; sometimes repaid, sometimes not). As a verb, loan is attested from 1540s, perhaps earlier, and formerly was current, but it has now been supplanted in England by lend, though it survives in American English. Slang loan shark first attested 1900 (see shark (n.)).

"pretended or suggested omission for rhetorical effect," 1580s, from Greek paraleipsis "passing by omission," from paraleipein "to leave on one side, pass over, leave untold," from para- "beside" (see para- (1)) + leipein "to leave" (from PIE root *leikw- "to leave"). As in passages that open with "not to mention," "to say nothing of," etc.