"one who operates a film projector," 1916, from projection + -ist.

"body projected or impelled forward by force," 1660s, from Modern Latin projectilis, from Latin proiectus, past participle of proicere "stretch out, throw forth," from pro- "forward" (see pro-) + combining form of iacere (past participle iactus) "to throw" (from PIE root *ye- "to throw, impel"). Specifically "a missile intended to be shot from a cannon by explosion of gunpowder, etc."

c. 1400, "projection, protuberance;" early 15c., "high or exalted position," from Old French eminence or directly from Latin eminentia "a distinctive feature, conspicuous part," from eminentem (nominative eminens) "standing out, projecting," figuratively, "prominent, distinctive," from assimilated form of ex "out" (see ex-) + -minere, which is related to mons "hill" (from PIE root *men- (2) "to project").

As a title of honor (now only of cardinals) it is attested from 1650s. The original Éminence grise (French, literally "gray eminence") was François Leclerc du Trembley (1577-1638), confidential agent of Richelieu.

c. 1200, deliveren, "save, rescue, set free, liberate," from Old French delivrer "to set free; remove; save, preserve; hand over (goods)," also used of childbirth, from Late Latin deliberare, from de "away" (see de-) + Latin liberare "to free," from liber "free, unrestricted, unimpeded" (see liberal (adj.)).

The sense of "to bring (a woman) to childbirth," in English is from c. 1300. Sense of "hand over, give, give up, yield" is from c. 1300 in English, which is in opposition to its etymological sense. Meaning "to project, cast, strike, throw" is from c. 1400. Related: Delivered; delivering.

1610s, "projecting, prominent, detached," from out- + standing (adj.) "having an erect position, upright." Figurative sense of "conspicuous, striking" is recorded from 1830. Meaning "unpaid, unsettled" is from 1797.

The verb outstand is attested in 16c. as "endure successfully, hold out against," now obsolete; the intransitive sense of "to project outward from the main body, stand out prominently" is by 1755 and probably is a back-formation from outstanding. Earlier were outstonden "to stand up" (mid-13c.); outstonding (verbal noun) "a prominence or protuberance" (early 15c.), but these seem not to have survived Middle English. Related: Outstandingly.

1700, thieves' cant, "to act as a lookout, spy on," from Middle English tuten "to peep, peer," probably from a variant of Old English totian "to stick out, peep, peer," from Proto-Germanic *tut- "project" (source also of Dutch tuit "sprout, snout," Middle Dutch tute "nipple, pap," Middle Low German tute "horn, funnel," Old Norse tota "teat, toe of a shoe"). The sense developed to "look out for jobs, votes, customers, etc., to try to get them" (1731), then "praise highly in an attempt to sell" (1920). Related: Touted; touting.

radioactive element, long one of the "missing elements," 1948, so called by discoverers Jacob Marinsky and Lawrence Glendenin, who detected it in 1945 in the fusion products of uranium while working on the Manhattan Project. From Prometheus (q.v.), who stole fire from the gods and was punished for it, + element name ending -ium. "The name not only symbolizes the dramatic way in which the element may be produced in quantity as a result of man's harnessing of the energy of nuclear fission, but also warns man of the impending danger of punishment by the vulture of war." [Marinsky and Glendenin]

c. 1300, mounten, "to get up on a horse;" mid-14c., "to rise up, rise in amount, ascend; fly," from Old French monter "to go up, ascend, climb, mount," from Vulgar Latin *montare, from Latin mons (genitive montis) "mountain" (from PIE root *men- (2) "to project"). The transitive meaning "to set or place in position" first recorded 1530s. Sense of "to get up on for purposes of copulation" is from 1590s. Meaning "prepare for presentation or exhibition" is by 1712. Military meaning "set up or post for defense" is by 1706; to mount an attack is by 1943. Related: Mounted; mounting.

Proto-Indo-European root meaning "to project." 

It forms all or part of: amenable; amount; cismontane; demeanor; dismount; eminence; eminent; imminence; imminent; menace; minacious; minatory; mons; montage; montagnard; monte; mount (n.1) "hill, mountain;" mount (v.) "to get up on;" mountain; mountebank; mouth; Osmond; Piedmont; promenade; prominence; prominent; promontory; remount; surmount; ultramontane.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit manya "nape of the neck;" Latin mons "mountain," eminere "to stand out;" Old Irish muin "neck," Welsh mwnwgl "neck," mwng "mane;" Welsh mynydd "mountain." 

"mountain, lofty hill, elevation of land," late Old English, from Anglo-French mount, Old French mont "mountain;" also perhaps partly from Old English munt "mountain;" both the Old English and the French words from Latin montem (nominative mons) "mountain," from PIE root *men- (2) "to stand out, project." "From the 17th c. in prose used chiefly of a more or less conical hill of moderate height rising from a plain; a hillock" [OED]. Archaic or poetic only by late 19c. except as part of a proper name. The Sermon on the Mount is in Matthew v-vii and Luke vi.