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quā̆drŭplāris, e, adj. [quadruplus], fourfold, quadruple (post-class.): numerus duplaris, triplaris, quadruplaris (al. quadruplus), Macr. Somn. Scip. 1, 19, 21.
quā̆drŭplo, no perf., ātum, 1, v. a. [quadruplus], to multiply by four, make fourfold, quadruple (post-class.), Dig. 4, 2, 14, §§ 1, 7: numerus quadruplatus, ib. 38, 10, 10, § 17; 47, 2, 50 pr.; Ambros. Apol. Dav. 5, 22.
quā̆drŭplor, āri, v. dep. [quadruplus], to be an informer, cheater, trickster, chicaner: neque quadruplari me volo, Plaut. Pers. 1, 2, 10 (al. quadrupulari).