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plebeian [plebeian 词源字典]: plebeian: [16] The plēbs were the ‘common people’ of ancient Rome (the word may connected with Greek pléthos ‘multitude’, a relative of English plethora). English gets plebeian from its derived adjective plēbēius. The connotations of ‘lower-classness’ have been transferred from ancient Rome to the present day, and inspired the derogatory pleb [19]. A plebiscite [16] is etymologically a ‘decree approved by the common people’.
[plebeian etymology, plebeian origin, 英语词源]
plebe (n.): also pleb, "member of the lowest class at a U.S. military academy," 1833, probably a shortened form of plebeian "one of the lower class," which in Latin also had the short form plebs or plebes.
plebeian (adj.): also plebian, "of or characteristic of the lower class," 1560s in a Roman historical sense, from Latin plebeius "belonging to the plebs," earlier plebes, "the populace, the common people" (as opposed to patricians, etc.), also "commonality; the mass, the multitude; the lower class," from PIE *ple- (see pleio-). In general (non-historical) use from 1580s.
plebiscite (n.): "direct vote of the people," 1860 (originally in reference to Italian unification), from French plébiscite (1776 in modern sense, originally with reference to Switzerland), from Latin plebiscitum "a decree or resolution of the people," from plebs (genitive plebis) "the common people" (see plebeian (adj.)) + scitum "decree," noun use of neuter past participle of sciscere "to assent, vote for, approve," inchoative of scire "to know" (see science). Used earlier (1530s) in a purely Roman historical context. Related: Plebiscitary.