gazebo (n.)
1752, supposedly a facetious formation from gaze + -bo, Latin first person singular future tense suffix (as in videbo "I shall see"), on model of earlier belvedere "cupola," from Italian, literally "a fair sight." But according to OED perhaps rather a corruption of some oriental word.
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reminisce (v.)

1829, "to recollect," a back-formation from reminiscence. Meaning "indulge in reminiscences" is from 1871. "[S]omewhat colloquial" [OED] and mistrusted by the literary (in the OED's earliest citation for it, reminisce is followed immediately by an aside, "the word shall never enter my vocabulary"). Related: Reminisced. Reminiscing as a verbal noun, "action of remembering," is by 1891.

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outpost (n.)

1757, "military position detached from the main body of troops or outside the limits of a camp," from out- + post (n.2). Originally in George Washington's letters. Phrase outpost of Empire (by 1895) "remotest territory of an empire" in later use often echoes Kipling:

There he shall blaze a nation’s ways with hatchet and with brand,
Till on his last-won wilderness an Empire’s outposts stand!
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baker (n.)

Old English bæcere "baker, one who bakes (especially bread)," agent noun from bacan "to bake" (see bake (v.)). Cognate with Dutch bakker, German Bäcker, Becker. In the Middle Ages, the craft had two divisions, braun-bakeres and whit-bakeres.

White bakers shall bake no hors brede..broune bakers shall bake whete brede as it comyth grounde fro the mylle withoute ony bultyng of the same. Also the seid broune bakers shall bake hors brede of clene benys and pesyn, And also brede that is called housholdersbrede. [Letterbook in the City of London Records Office, Guildhall, 1441]

Baker's dozen "thirteen" is from 1590s.

These dealers [hucksters] ... on purchasing their bread from the bakers, were privileged by law to receive thirteen batches for twelve, and this would seem to have been the extent of their profits. Hence the expression, still in use, "A baker's dozen." [H.T. Riley, "Liber Albus," 1859]

But Brewer says the custom originated when there were heavy penalties for short weight, bakers giving the extra bread to secure themselves.

Baker, to spell, an expression for attempting anything difficult. In old spelling-books, baker was the first word of two syllables, and when a child came to it, he thought he had a hard task before him. [Barrère and Leland, "A Dictionary of Slang, Jargon & Cant," 1897]. 
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state (n.1)

c. 1200, "circumstances, position in society, temporary attributes of a person or thing, conditions," from Old French estat "position, condition; status, stature, station," and directly from Latin status "a station, position, place; way of standing, posture; order, arrangement, condition," figuratively "standing, rank; public order, community organization," noun of action from past participle stem of stare "to stand" from PIE root *sta- "to stand, make or be firm." Some Middle English senses are via Old French estat (French état; see estate).

The Latin word was adopted into other modern Germanic languages (German, Dutch staat) but chiefly in the political senses only. Meaning "physical condition as regards form or structure" is attested from late 13c. Meaning "mental or emotional condition" is attested from 1530s (phrase state of mind first attested 1749); colloquial sense of "agitated or perturbed state" is from 1837.

He [the President] shall from time to time give to the Congress Information of the State of the Union, and recommend to their Consideration such Measures as he shall judge necessary and expedient. [U.S. Constitution, Article II, Section iii]
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phenomenalism (n.)

"philosophical doctrine or way of thinking which holds that phenomena are the only realities or objects of knowledge," 1856, in a Christian context (opposed to materialism), from phenomenal + -ism. Used earlier in the same sense was phenomenism (1830). Related: Phenomenalist (1856).

I AM about to try to explain a manner of thought which, in various applications, or perhaps misapplications, of it, I have been in the habit of mentally characterizing, and perhaps of speaking of, as 'positivism.' I shall now however not use this term, but the term 'phenomenalism.' I understand the two terms to express in substance the same thing .... The reason for the change is, because in the purely intellectual application which I shall now make of the term, ''phenomenalism' may perhaps carry with it less danger of extraneous associations being joined with it, and may express what I mean more generally .... [John Grote, "Rough Notes on Modern Intellectual Science," 1865]
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bowls (n.)

game played with balls, mid-15c. (implied in bowlyn), from gerund of bowl "wooden ball" (early 15c.), from Old French bole (13c., Modern French boule) "ball," ultimately from Latin bulla "bubble, knob, round thing" (see bull (n.2)).

Noon apprentice ... [shall] play ... at the Tenys, Closshe, Dise, Cardes, Bowles nor any other unlawfull game. [Act 11, Henry VII, 1495]
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placebo (n.)

early 13c., name given to the rite of Vespers of the Office of the Dead, so called from the opening of the first antiphon, "I will please the Lord in the land of the living" (Psalms cxvi.9, in Vulgate Placebo Domino in regione vivorum), from Latin placebo "I shall please," future indicative of placere "to please" (see please).

Medical sense is recorded by 1785, "a medicine given more to please than to benefit the patient." Placebo effect is attested from 1900.

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maverick (n.)

1867, "calf or yearling found without an owner's brand," a word from the great cattle ranches of the American West, so called for Samuel A. Maverick (1803-1870), Texas cattle owner who was notoriously negligent in branding his calves.

All neat stock found running at large in this State, without a mother, and upon which there is neither mark nor brand, shall be deemed a maverick, and shall be sold to the highest bidder for cash, at such time and place, and under such rules and regulations, as the round-up commissioners of the district shall prescribe. [act to amend the General Statutes of the State of Colorado, approved April 8, 1885]

The family name is an old one in Boston, and a different Samuel Maverick was killed in the Boston Massacre. The sense of "individualist, unconventional person" is said to be attested by 1886, via the notion of "masterless," but its modern popularity  seems to date to the late 1930s and the career of Maury Maverick (1895-1954) of Texas, grandson of Samuel the rancher and a Democratic congressman 1935-1939 famous for his liberal independent streak, who also coined gobbledygook.

"The Crisis" (April 1939) wrote that "During his stormy career in Washington Maverick became known as the one dependable liberal among the southerners. He recognized the broad problems of our nation, refusing to allow his vision to be limited by sectional prejudices, or racial or economic bugaboos. He was the only southern congressman to vote for the Gavagan federal anti-lynching bill. Not only did he vote for it, but he made a speech on the floor of the House in support of it."

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