Etymology
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PIN 

acronym for personal identification number, 1981; from the first it has been used with a redundant number.

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table (n.)

late 12c., "board, slab, plate," from Old French table "board, square panel, plank; writing table; picture; food, fare" (11c.), and late Old English tabele "writing tablet, gaming table," from Germanic *tabal (source also of Dutch tafel, Danish tavle, Old High German zabel "board, plank," German Tafel). Both the French and Germanic words are from Latin tabula "a board, plank; writing table; list, schedule; picture, painted panel," originally "small flat slab or piece" usually for inscriptions or for games (source also of Spanish tabla, Italian tavola), of uncertain origin, related to Umbrian tafle "on the board."

The sense of "piece of furniture with the flat top and legs" first recorded c. 1300 (the usual Latin word for this was mensa (see mensa); Old English writers used bord (see board (n.1)). Especially the table at which people eat, hence "food placed upon a table" (c. 1400 in English). The meaning "arrangement of numbers or other figures on a tabular surface for convenience" is recorded from late 14c. (as in table of contents, mid-15c.).

Figurative phrase turn the tables (1630s) is from backgammon (in Old and Middle English the game was called tables). Table talk "familiar conversation around a table" is attested from 1560s, translating Latin colloquia mensalis. Table manners is from 1824. Table-hopping is recorded by 1943. The adjectival phrase under-the-table "hidden from view" is recorded from 1949; to be under the table "passed out from excess drinking" is recorded from 1913. Table tennis "ping-pong" is recorded from 1887. Table-rapping in spiritualism, supposedly an effect of supernatural powers, is from 1853.

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table (v.)

mid-15c., "enter into a list, form into a list or catalogue," also "provide with food," from table (n.). In parliamentary sense, 1718, originally "to lay on the (speaker's) table for discussion;" but in U.S. political jargon it has chiefly the sense of "to postpone indefinitely" (1866) via notion of "lay aside for future consideration." Related: Tabled; tabling.

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pin (n.)

late Old English pinn "peg or bolt of wood or metal used to hold things in place or fasten them together," from Proto-Germanic *penn- "jutting point or peak" (source also of Old Saxon pin "peg," Old Norse pinni "peg, tack," Middle Dutch pin "pin, peg," Old High German pfinn, German Pinne "pin, tack") from Latin pinna "a feather, plume;" in plural "a wing;" also "fin, scoop of a water wheel;" also "a pinnacle; a promontory, cape; battlement" (as in Luke iv.9 in Vulgate) and so applied to "points" of various sorts, from PIE root *pet- "to rush, to fly."

De Vaan and Watkins say Latin pinna is a derivative of penna, literally "feather" (see pen (n.1)); older theories regarded pinna as a separate word from a root meaning "sharp point." The Latin word also was borrowed in Celtic: Irish pinne "a pin, peg, spigot;" Welsh pin "a pin, pen."

The transition from 'feather' to 'pin' (a slender or pointed instrument) appears to have been through 'pen,' a quill, to ' pen,' a style or stylus, hence any slender or pointed instrument [Century Dictionary]

As a part of a lock or latch, c. 1200; as a control for a mechanical device, late 14c. The modern slender wire pin, used as a fastener for clothing or in sewing, is attested by this name by late 14c., perhaps late 13c. Transferred sense of "leg" is recorded from 1520s and holds the older sense. The meaning "wooden stick or club set up to be knocked down in a game" (skittles, bowling, etc.) is by 1570s.

Pin-money "annual sum allotted to a woman for personal expenses on dress, etc." is attested from 1620s. Pins and needles "tingling sensation" is from 1810. The sound of a pin dropping as a type of something all but silent is from 1775.

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pin (v.)

mid-14c., pinnen, "to affix with a pin," from pin (n.). Figurative uses, on the notion of "seize and hold fast in the same spot or position" are from 1570s. Related: Pinned; pinning. Sense of "to hold someone or something down so he or it cannot escape" is attested from 1740. In U.S. colleges, as a reference to the bestowal of a fraternity pin on a female student as an indication of a relationship, it is attested by 1938. Phrase pin down "define" is from 1951.

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pin-hole (n.)

"small hole made by the puncture of a pin," 1670s, from pin (n.) + hole (n.). By 1891 in reference to a type of camera using a pin-hole in place of a lens.

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pin-oak (n.)

type of tree found in wet places in the Eastern U.S., from pin (n.) + oak; "so named in allusion to the persistent dead branches, which resemble pins driven into the trunk" [Century Dictionary].

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water-table (n.)

"level of saturated ground," 1879, from water (n.1) + table (n.).

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round-table (n.)

also roundtable, 1826 in reference to a gathering of persons in which all are accorded equal status (there being no head of a round table.) King Arthur's Round Table is attested from c. 1300, translating Old French table ronde (1155, in Wace's Roman de Brut).

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side-table (n.)

late 14c., "table to the side of the high table, along the wall of the room, for those of lower status," from side (n.) + table (n.).

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