Etymology
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Trojan (adj.)
Old English Troian "of or pertaining to ancient Troy," from Latin Trojanus, from Troia, Troja "Troy," from the Greek name for the city, said to be from Tros, name of a king of Phrygia, the mythical founder of Troy. Trojan horse was figurative of ambush-from-within in Roman times (equus Troianus); attested in English from 1570s; the computer virus sense is attested by 1982.

As a noun from mid-14c., "inhabitant of ancient Troy;" in early modern English, the noun could mean "a determined fellow, one who fights or works hard," from the Trojans' long resistance to the Greeks in the Trojan War, but also in 17c., it was a colloquial term for "person of dissolute life, carousing companion." The trade name for a brand of prophylactic contraceptive was registered 1927 in U.S.
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partisan (n.)

also partizan, 1550s, "one who takes part with another, zealous supporter," especially one whose judgment is clouded by prejudiced adherence to a party, from French partisan (15c.), from dialectal upper Italian partezan (Tuscan partigiano) "member of a faction, partner," from parte "part, party," from Latin partem (nominative pars) "a part, piece, a share, a division; a party or faction; a part of the body; a fraction; a function, office" (from PIE root *pere- (2) "to grant, allot").

In military use, "member of a detachment of troops sent on a special mission," from 1690s. As these commonly were irregular troops, it took on the sense of "guerrilla fighter" in the Peninsular campaign of the Napoleonic wars and again in reference to resistance to Nazi occupation in the Balkans and Eastern Europe in World War II.

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terrorist (n.)

in the modern sense, 1944, especially in reference to Jewish tactics against the British in Palestine — earlier it was used of extremist revolutionaries in Russia who attempted to demoralize the government by terror (1866); and Jacobins during the French Revolution (1795) — from French terroriste; see terror + -ist (also see terrorism).

The term now usually refers to a member of a clandestine or expatriate organization aiming to coerce an established government by acts of violence against it or its subjects. [OED]

The tendency of one party's terrorist to be another's guerrilla or freedom fighter was noted in reference to the British action in Cyprus (1956) and the war in Rhodesia (1973). The word terrorist has been applied, at least retroactively, to the Maquis resistance in occupied France in World War II (as in in the "Spectator," Oct. 20, 1979).

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A.D. 
1570s, an abbreviation of Latin Anno Domini "Year of the Lord." This system of counting years was put forth by Dionysius Exiguus in 527 or 533 C.E., but used at first only for Church business. Introduced in Italy in 7c., France (partially) in 8c. In England, first found in a charter of 680 C.E. Ordained for all ecclesiastical documents in England by the Council of Chelsea, July 27, 816.

The resistance to it might have come in part because Dionysius chose 754 A.U.C. as the birth year of Jesus, while many early Christians would have thought it was 750 A.U.C. (See John J. Bond, "Handy-Book of Rules and Tables for Verifying Dates With the Christian Era," 4th ed., London: George Bell & Sons, 1889.) There is a use of simple a for anno domini in an English document from c. 1400; A.C., for Anno Christi, also was common 17c.
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waterlogged (adj.)

1759 (in an account of the Battle of Lagos in "Universal Magazine," September), from water (n.1) + log (n.1); the notion apparently is of "reduce to a log-like condition." Compare logged.

WATER LOGGED, the state of a ship when, by receiving a great quantity of water into her hold, by leaking, &c., she has become heavy and inactive upon the sea, so as to yield without resistance to the efforts of every wave rushing over her decks. As, in this dangerous situation, the center of gravity is no longer fixed, but fluctuating from place to place, the stability of the ship is utterly lost. She is therefore almost totally deprived of the use of her sails, which would operate to overset her, or press the head under water. Hence there is no resource for the crew, except to free her by the pumps, or to abandon her by the boats as soon as possible. [William Falconer, "An Universal Dictionary of the Marine," London, 1784]

The verb waterlog (1779) appears to be a back-formation.

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aesthetic (n.)
1798, from German Ästhetisch (mid-18c.) or French esthétique (which is from German), ultimately from Greek aisthetikos "of or for perception by the senses, perceptive," of things, "perceptible," from aisthanesthai "to perceive (by the senses or by the mind), to feel," from PIE *awis-dh-yo-, from root *au- "to perceive."

Popularized in English by translations of Kant and used originally in the classically correct sense "science which treats of the conditions of sensuous perception" [OED]. Kant had tried to reclaim the word after Alexander Baumgarten had taken it in German to mean "criticism of taste" (1750s), but Baumgarten's sense attained popularity in English c. 1830s (despite scholarly resistance) and freed the word from philosophy. Walter Pater used it (1868) to describe the late 19c. movement that advocated "art for art's sake," which further blurred the sense. [Whewell had proposed callesthetics for "the science of the perception of the beautiful."]

As an adjective by 1798 "of or pertaining to sensual perception;" 1821 as "of or pertaining to appreciation of the beautiful." Related: Aesthetically.
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burst (v.)
Old English berstan (intransitive) "break suddenly, shatter as a result of pressure from within" (class III strong verb; past tense bærst, past participle borsten), from a West Germanic metathesis of Proto-Germanic *brest- (source also of Old Saxon brestan, Old Frisian bersta, Middle Dutch berstan, Low German barsten, Dutch barsten, Old High German brestan, German bersten "to burst").

The forms reverted to brest- in Middle English from influence of Old Norse brestan/brast/brosten, from the same Germanic root, but it was re-metathesized late 16c. and emerged in the modern form, though brast was common as past tense through 17c. and survives in dialect.

In Old English "Chiefly said of things possessing considerable capacity for resistance and breaking with loud noise; often of cords, etc., snapping under tension; also of spears, swords, etc., shivered in battle" [OED]; in late Old English also "break violently open as an effect of internal forces." Figuratively, in reference to being over-full of excitement, anticipation, emotion, etc., from c. 1200. Transitive sense ("to cause to break, cause to explode") is from late 13c. Meaning "to issue suddenly and abundantly" is from c. 1300 (literal), mid-13c. (figurative). Meaning "break (into) sudden activity or expression" is from late 14c. Related: Bursting.
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bear (v.)
Origin and meaning of bear

Old English beran "to carry, bring; bring forth, give birth to, produce; to endure without resistance; to support, hold up, sustain; to wear" (class IV strong verb; past tense bær, past participle boren), from Proto-Germanic *beranan (source also of Old Saxon beran, Old Frisian bera "bear, give birth," Middle Dutch beren "carry a child," Old High German beran, German gebären, Old Norse bera "carry, bring, bear, endure; give birth," Gothic bairan "to carry, bear, give birth to"), from PIE root *bher- (1) "carry a burden, bring," also "give birth" (though only English and German strongly retain this sense, and Russian has beremennaya "pregnant").

Old English past tense bær became Middle English bare; alternative bore began to appear c. 1400, but bare remained the literary form till after 1600. Past participle distinction of borne for "carried" and born for "given birth" is from late 18c.

Many senses are from notion of "move onward by pressure." From c. 1300 as "possess as an attribute or characteristic." Meaning "sustain without sinking" is from 1520s; to bear (something) in mind is from 1530s; meaning "tend, be directed (in a certain way)" is from c. 1600. To bear down "proceed forcefully toward" (especially in nautical use) is from 1716. To bear up is from 1650s as "be firm, have fortitude."

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V 
In Middle English, -u- and -v- were used interchangeably, though with a preference for v- as the initial letter (vnder, vain, etc.) and -u- elsewhere (full, euer, etc.). The distinction into consonant and vowel identities was established in English by 1630, under influence of continental printers, but into 19c. some dictionaries and other catalogues continued to list -u- and -v- words as a single series.

No native Anglo-Saxon words begin in v- except those (vane, vat, vixen) altered by the southwestern England habit of replacing initial f- with v- (and initial s- with z-). Confusion of -v- and -w- also was a characteristic of 16c. Cockney accents.

As a Roman numeral, "five." In German rocket weapons systems of World War II, it stood for Vergeltungswaffe "reprisal weapon." V-eight as a type of motor engine is recorded from 1929 (V-engine is attested from 1909), so called for the arrangement. The V for "victory" hand sign was conceived January 1941 by Belgian politician and resistance leader Victor de Laveleye, to signify French victoire and Flemish vrijheid ("freedom"). It was broadcast into Europe by Radio België/Radio Belgique and popularized by the BBC by June 1941, from which time it became a universal allied gesture.
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fight (v.)

Old English feohtan "to combat, contend with weapons, strive; attack; gain by fighting, win" (intransitive; class III strong verb; past tense feaht, past participle fohten), from Proto-Germanic *fe(u)hta (source also of Old High German fehtan, German fechten, Middle Dutch and Dutch vechten, Old Frisian fiuhta "to fight"), probably from PIE *pek- (2) "to comb, to pluck out" wool or hair (source also of Lithuanian pėšti"to pluck," Greek pekein "to comb, shear," pekos "fleece, wool;" Persian pashm "wool, down," Latin pectere "to comb," Sanskrit paksman- "eyebrows, hair"). Apparently the notion is "pulling roughly," or "to tear out one another's hair." But perhaps it is from the source of Latin pugnus "fist."

Spelling substitution of -gh- for a "hard H" sound was a Middle English scribal habit, especially before -t-. In some late Old English examples, the middle consonant was represented by a yogh. Among provincial early Modern English spellings, Wright lists faight, fate, fecht, feeght, feight, feit, feyght, feyt, feort, foight.

From c. 1200 as "offer resistance, struggle;" also "to quarrel, wrangle, create a disturbance." From late 14c. as "be in conflict." Transitive use from 1690s. To fight for "contest on behalf of" is from early 14c. To fight back "resist" is recorded from 1890. Well figt þat wel fligt ("he fights well that flies fast") was a Middle English proverb.

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