Etymology
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model (n.)

1570s, "likeness made to scale; architect's set of designs," from French modelle (16c., Modern French modèle), from Italian modello "a model, mold," from Vulgar Latin *modellus, from Latin modulus "a small measure, standard," diminutive of modus "manner, measure" (from PIE root *med- "take appropriate measures"). Sense of "a standard for imitation or comparison, thing or person that serves or may serve as a pattern or type" is from 1630s.

If the Model Boy was in either of these Sunday-schools, I did not see him. The Model Boy of my time—we never had but the one—was perfect: perfect in manners, perfect in dress, perfect in conduct, perfect in filial piety, perfect in exterior godliness; but at bottom he was a prig; and as for the contents of his skull, they could have changed place with the contents of a pie and nobody would have been the worse off for it but the pie. ["Mark Twain," "Life on the Mississippi," 1883]

Meaning "motor vehicle of a particular design" is from 1900 (such as Model T, 1908; Model A, 1927; Ford's other early models included C, F, and B). Sense of "artist's model, living person who serves as the type of a figure to be painted or sculpted" is recorded by 1690s; that of "fashion model" is from 1904. German, Swedish modell, Dutch, Danish model are from French or Italian.

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role (n.)

c. 1600, "part or character one takes," from French rôle "part played by a person in life," literally "roll" (of paper) on which an actor's part is written, from Old French rolle (see roll (n.)). Not originally in English with direct reference to actors and the stage, but figurative of them. The meaning "any conspicuous function performed characteristically by someone" is by 1875. In the social psychology sense is from 1913. Role model, one taken by others as a model in performance of some role, is attested by 1957.

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model (adj.)

"serving as a model; worthy to serve as an exemplar," 1844, from model (n.). Model railway is by 1864.

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model (v.)

c. 1600, "describe in detail" (a sense now obsolete); 1660s, "fashion a figure or imitation (of something) in clay or wax," from model (n.). Earlier was modelize (c. 1600). From 1730 as "construct or arrange in a set manner." From 1915 in the sense "to act as a fashion model, to display (clothes)." Related: Modeled; modeling; modelled; modelling.

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roleplay (n.)

also role-play, "act or condition of behaving as another would behave in a certain situation," 1958, from the verbal phrase, "to act out the role of" (by 1949); see role (n.) + play (v.). Related: Role-playing

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showgirl (n.)

"An actress whose role is decorative rather than histrionic" [OED], by 1833, from show (n.) + girl. Earlier "a pretty, talented girl; girl fit to model styles or behavior," by 1816.

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recast (v.)

also re-cast, c. 1600, "to throw again," from re- "back, again" + cast (v.). Sense of "to cast or form anew, remodel," especially of literary works and other writing, is from 1790. Meaning "compute anew" is by 1865. Theater sense of "assign an actor or role to another role or actor" is by 1951. Related: Recasting. As a noun, "a fresh molding, arrangement, or modification," by 1840.

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rpg (n.)

by 1979, initialism (acronym) from role-playing game (see roleplay). As an initialism for rocket-propelled grenade, by 1970.

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magnetosphere (n.)

coined 1959, from magneto- + sphere. So called because it is the region around the earth (and some other planets) in which the magnetic field of the planet plays a dominant role in the motion of particles.

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remodel (v.)

also re-model, "to mold, shape, or fashion anew," 1789, from re- "back, again" + model (v.) "fashion, construct." Related: Remodeled; remodeling.

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